18990302312 has 32 divisors (see below), whose sum is σ = 35737999200. Its totient is φ = 9460215744.

The previous prime is 18990302311. The next prime is 18990302341. The reversal of 18990302312 is 21320309981.

It is a super-4 number, since 4×18990302312⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (18990302311) 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, 5364239 + ... + 5367777.

It is an arithmetic number, because the mean of its divisors is an integer number (1116812475).

Almost surely, 2^18990302312 is an apocalyptic number.

It is an amenable number.

18990302312 is a deficient number, since it is larger than the sum of its proper divisors (16747696888).

18990302312 is a wasteful number, since it uses less digits than its factorization.

18990302312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825 (or 5821 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 18990302312 in words is "eighteen billion, nine hundred ninety million, three hundred two thousand, three hundred twelve".