18699072 has 56 divisors (see below), whose sum is σ = 56546496. Its totient is φ = 5342208.

The previous prime is 18699067. The next prime is 18699077. The reversal of 18699072 is 27099681.

It is an interprime number because it is at equal distance from previous prime (18699067) and next prime (18699077).

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×18699072² = 699310587322368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18699077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5613 + ... + 8300.

Almost surely, 2^18699072 is an apocalyptic number.

18699072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18699072 is an abundant number, since it is smaller than the sum of its proper divisors (37847424).

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

18699072 is a wasteful number, since it uses less digits than its factorization.

18699072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13935 (or 13925 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 18699072 is about 4324.2423613854. The cubic root of 18699072 is about 265.4238949696.

The spelling of 18699072 in words is "eighteen million, six hundred ninety-nine thousand, seventy-two".