18972095318 has 8 divisors (see below), whose sum is σ = 31045246920. Its totient is φ = 8623679680.

The previous prime is 18972095297. The next prime is 18972095347. The reversal of 18972095318 is 81359027981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18972095318² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18972095318.

It is a congruent number.

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, 431183963 + ... + 431184006.

It is an arithmetic number, because the mean of its divisors is an integer number (3880655865).

Almost surely, 2^18972095318 is an apocalyptic number.

18972095318 is a deficient number, since it is larger than the sum of its proper divisors (12073151602).

18972095318 is a wasteful number, since it uses less digits than its factorization.

18972095318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862367982.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 18972095318 in words is "eighteen billion, nine hundred seventy-two million, ninety-five thousand, three hundred eighteen".