18887900650 has 24 divisors (see below), whose sum is σ = 35576205120. Its totient is φ = 7459523760.

The previous prime is 18887900641. The next prime is 18887900693. The reversal of 18887900650 is 5600978881.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2386924 + ... + 2394823.

It is an arithmetic number, because the mean of its divisors is an integer number (1482341880).

Almost surely, 2^18887900650 is an apocalyptic number.

18887900650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18887900650 is a deficient number, since it is larger than the sum of its proper divisors (16688304470).

18887900650 is a wasteful number, since it uses less digits than its factorization.

18887900650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781838 (or 4781833 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 18887900650 in words is "eighteen billion, eight hundred eighty-seven million, nine hundred thousand, six hundred fifty".