18936689250 has 32 divisors (see below), whose sum is σ = 47265978240. Its totient is φ = 5049783600.

The previous prime is 18936689209. The next prime is 18936689257. The reversal of 18936689250 is 5298663981.

It is not an unprimeable number, because it can be changed into a prime (18936689257) 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 15 ways as a sum of consecutive naturals, for example, 12623710 + ... + 12625209.

It is an arithmetic number, because the mean of its divisors is an integer number (1477061820).

Almost surely, 2^18936689250 is an apocalyptic number.

18936689250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18936689250 is an abundant number, since it is smaller than the sum of its proper divisors (28329288990).

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

18936689250 is a wasteful number, since it uses less digits than its factorization.

18936689250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25248939 (or 25248929 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 57.

The spelling of 18936689250 in words is "eighteen billion, nine hundred thirty-six million, six hundred eighty-nine thousand, two hundred fifty".