21192864193774 has 192 divisors, whose sum is σ = 42821280887616. Its totient is φ = 7768944562176.

The previous prime is 21192864193769. The next prime is 21192864193799. The reversal of 21192864193774 is 47739146829112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 526680784 + ... + 526721020.

It is an arithmetic number, because the mean of its divisors is an integer number (223027504623).

Almost surely, 2^{21192864193774} is an apocalyptic number.

21192864193774 is an abundant number, since it is smaller than the sum of its proper divisors (21628416693842).

21192864193774 is a wasteful number, since it uses less digits than its factorization.

21192864193774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40659 (or 40652 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 64.

The spelling of 21192864193774 in words is "twenty-one trillion, one hundred ninety-two billion, eight hundred sixty-four million, one hundred ninety-three thousand, seven hundred seventy-four".