18997669152 has 192 divisors, whose sum is σ = 69082675200. Its totient is φ = 4934442240.

The previous prime is 18997669151. The next prime is 18997669157. The reversal of 18997669152 is 25196679981.

It is a super-2 number, since 2×18997669152² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 18997669152.

It is not an unprimeable number, because it can be changed into a prime (18997669151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76252 + ... + 209307.

It is an arithmetic number, because the mean of its divisors is an integer number (359805600).

Almost surely, 2^18997669152 is an apocalyptic number.

18997669152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18997669152 is an abundant number, since it is smaller than the sum of its proper divisors (50085006048).

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

18997669152 is a wasteful number, since it uses less digits than its factorization.

18997669152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285596 (or 285582 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 63.

The spelling of 18997669152 in words is "eighteen billion, nine hundred ninety-seven million, six hundred sixty-nine thousand, one hundred fifty-two".