18915154090 has 32 divisors (see below), whose sum is σ = 39082621824. Its totient is φ = 6456621120.

The previous prime is 18915154079. The next prime is 18915154099. The reversal of 18915154090 is 9045151981.

It is not an unprimeable number, because it can be changed into a prime (18915154099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579301 + ... + 611080.

It is an arithmetic number, because the mean of its divisors is an integer number (1221331932).

Almost surely, 2^18915154090 is an apocalyptic number.

18915154090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18915154090 is an abundant number, since it is smaller than the sum of its proper divisors (20167467734).

18915154090 is a wasteful number, since it uses less digits than its factorization.

18915154090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190622.

The product of its (nonzero) digits is 64800, while the sum is 43.

The spelling of 18915154090 in words is "eighteen billion, nine hundred fifteen million, one hundred fifty-four thousand, ninety".