18654322890 has 32 divisors (see below), whose sum is σ = 51166143360. Its totient is φ = 4263845184.

The previous prime is 18654322849. The next prime is 18654322919. The reversal of 18654322890 is 9822345681.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44414845 + ... + 44415264.

It is an arithmetic number, because the mean of its divisors is an integer number (1598941980).

Almost surely, 2^18654322890 is an apocalyptic number.

18654322890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18654322890 is an abundant number, since it is smaller than the sum of its proper divisors (32511820470).

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

18654322890 is a wasteful number, since it uses less digits than its factorization.

18654322890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88830126.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 18654322890 in words is "eighteen billion, six hundred fifty-four million, three hundred twenty-two thousand, eight hundred ninety".