16425018 has 40 divisors (see below), whose sum is σ = 37518228. Its totient is φ = 5368896.

The previous prime is 16425007. The next prime is 16425023. The reversal of 16425018 is 81052461.

16425018 is a `hidden beast` number, since 1 + 642 + 5 + 0 + 18 = 666.

16425018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 14768649 + 1656369 = 3843^2 + 1287^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 16424982 and 16425000.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7630 + ... + 9542.

Almost surely, 2^16425018 is an apocalyptic number.

16425018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16425018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18759114).

16425018 is an abundant number, since it is smaller than the sum of its proper divisors (21093210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16425018 is a wasteful number, since it uses less digits than its factorization.

16425018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980 (or 1971 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 16425018 is about 4052.7790465309. The cubic root of 16425018 is about 254.1959448610.

Adding to 16425018 its reverse (81052461), we get a palindrome (97477479).

The spelling of 16425018 in words is "sixteen million, four hundred twenty-five thousand, eighteen".