18248940 has 36 divisors (see below), whose sum is σ = 55355664. Its totient is φ = 4866336.

The previous prime is 18248933. The next prime is 18248941. The reversal of 18248940 is 4984281.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×18248940² = 666047622247200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18248895 and 18248904.

It is not an unprimeable number, because it can be changed into a prime (18248941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50512 + ... + 50871.

Almost surely, 2^18248940 is an apocalyptic number.

18248940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18248940 is an abundant number, since it is smaller than the sum of its proper divisors (37106724).

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

18248940 is a wasteful number, since it uses less digits than its factorization.

18248940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101398 (or 101393 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18248940 is about 4271.8778072412. The cubic root of 18248940 is about 263.2767739805.

The spelling of 18248940 in words is "eighteen million, two hundred forty-eight thousand, nine hundred forty".