18639050252 has 12 divisors (see below), whose sum is σ = 32941292496. Its totient is φ = 9227252400.

The previous prime is 18639050251. The next prime is 18639050263. The reversal of 18639050252 is 25205093681.

It is not an unprimeable number, because it can be changed into a prime (18639050251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23067728 + ... + 23068535.

It is an arithmetic number, because the mean of its divisors is an integer number (2745107708).

Almost surely, 2^18639050252 is an apocalyptic number.

It is an amenable number.

18639050252 is a deficient number, since it is larger than the sum of its proper divisors (14302242244).

18639050252 is a wasteful number, since it uses less digits than its factorization.

18639050252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46136368 (or 46136366 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 18639050252 in words is "eighteen billion, six hundred thirty-nine million, fifty thousand, two hundred fifty-two".