17994501772 has 12 divisors (see below), whose sum is σ = 33912714976. Its totient is φ = 8305154640.

The previous prime is 17994501731. The next prime is 17994501809. The reversal of 17994501772 is 27710549971.

It is a happy number.

It is a super-2 number, since 2×17994501772² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 346048111 = 17994501772 / (1 + 7 + 9 + 9 + 4 + 5 + 0 + 1 + 7 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173024004 + ... + 173024107.

Almost surely, 2^17994501772 is an apocalyptic number.

It is an amenable number.

17994501772 is a deficient number, since it is larger than the sum of its proper divisors (15918213204).

17994501772 is a wasteful number, since it uses less digits than its factorization.

17994501772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346048128 (or 346048126 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 52.

The spelling of 17994501772 in words is "seventeen billion, nine hundred ninety-four million, five hundred one thousand, seven hundred seventy-two".