21094220392 has 32 divisors (see below), whose sum is σ = 45774086400. Its totient is φ = 8925943104.

The previous prime is 21094220363. The next prime is 21094220443. The reversal of 21094220392 is 29302249012.

It is a super-2 number, since 2×21094220392² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2379643 + ... + 2388490.

It is an arithmetic number, because the mean of its divisors is an integer number (1430440200).

Almost surely, 2^21094220392 is an apocalyptic number.

It is an amenable number.

21094220392 is an abundant number, since it is smaller than the sum of its proper divisors (24679866008).

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

21094220392 is a wasteful number, since it uses less digits than its factorization.

21094220392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4768225 (or 4768221 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 21094220392 in words is "twenty-one billion, ninety-four million, two hundred twenty thousand, three hundred ninety-two".