18969200918390 has 32 divisors (see below), whose sum is σ = 34171524747360. Its totient is φ = 7581690929664.

The previous prime is 18969200918387. The next prime is 18969200918489. The reversal of 18969200918390 is 9381900296981.

It is a Curzon number.

It is a congruent number.

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, 65268977 + ... + 65558963.

It is an arithmetic number, because the mean of its divisors is an integer number (1067860148355).

Almost surely, 2^{18969200918390} is an apocalyptic number.

18969200918390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18969200918390 is a deficient number, since it is larger than the sum of its proper divisors (15202323828970).

18969200918390 is a wasteful number, since it uses less digits than its factorization.

18969200918390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295136.

The product of its (nonzero) digits is 15116544, while the sum is 65.

The spelling of 18969200918390 in words is "eighteen trillion, nine hundred sixty-nine billion, two hundred million, nine hundred eighteen thousand, three hundred ninety".