18469620 has 120 divisors (see below), whose sum is σ = 62467944. Its totient is φ = 4541184.

The previous prime is 18469613. The next prime is 18469687. The reversal of 18469620 is 2696481.

It can be written as a sum of positive squares in 4 ways, for example, as 1774224 + 16695396 = 1332^2 + 4086^2 .

It is a super-2 number, since 2×18469620² = 682253725888800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) 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 (36).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 20622 + ... + 21498.

Almost surely, 2^18469620 is an apocalyptic number.

18469620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18469620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31233972).

18469620 is an abundant number, since it is smaller than the sum of its proper divisors (43998324).

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

18469620 is a wasteful number, since it uses less digits than its factorization.

18469620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 18469620 is about 4297.6295791983. The cubic root of 18469620 is about 264.3337720530. Note that the first 3 decimals are identical.

The spelling of 18469620 in words is "eighteen million, four hundred sixty-nine thousand, six hundred twenty".