21419759792 has 20 divisors (see below), whose sum is σ = 43305167280. Its totient is φ = 10244232768.

The previous prime is 21419759741. The next prime is 21419759813. The reversal of 21419759792 is 29795791412.

It is a happy number.

It is a super-2 number, since 2×21419759792² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29102567 + ... + 29103302.

It is an arithmetic number, because the mean of its divisors is an integer number (2165258364).

Almost surely, 2^21419759792 is an apocalyptic number.

It is an amenable number.

21419759792 is an abundant number, since it is smaller than the sum of its proper divisors (21885407488).

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

21419759792 is a wasteful number, since it uses less digits than its factorization.

21419759792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58205900 (or 58205894 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 56.

The spelling of 21419759792 in words is "twenty-one billion, four hundred nineteen million, seven hundred fifty-nine thousand, seven hundred ninety-two".