21192203390720 has 72 divisors (see below), whose sum is σ = 50809706426976. Its totient is φ = 8468906323968.

The previous prime is 21192203390707. The next prime is 21192203390731. The reversal of 21192203390720 is 2709330229112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6426947 + ... + 9148226.

Almost surely, 2^{21192203390720} is an apocalyptic number.

21192203390720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21192203390720 is an abundant number, since it is smaller than the sum of its proper divisors (29617503036256).

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

21192203390720 is a wasteful number, since it uses less digits than its factorization.

21192203390720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15576257 (or 15576243 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 21192203390720 in words is "twenty-one trillion, one hundred ninety-two billion, two hundred three million, three hundred ninety thousand, seven hundred twenty".