18923340422590 has 16 divisors (see below), whose sum is σ = 34064551722672. Its totient is φ = 7568771955264.

The previous prime is 18923340422573. The next prime is 18923340422647. The reversal of 18923340422590 is 9522404332981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70385844 + ... + 70654183.

It is an arithmetic number, because the mean of its divisors is an integer number (2129034482667).

Almost surely, 2^{18923340422590} is an apocalyptic number.

18923340422590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18923340422590 is a deficient number, since it is larger than the sum of its proper divisors (15141211300082).

18923340422590 is a wasteful number, since it uses less digits than its factorization.

18923340422590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141053451.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 18923340422590 in words is "eighteen trillion, nine hundred twenty-three billion, three hundred forty million, four hundred twenty-two thousand, five hundred ninety".