21426718592 has 16 divisors (see below), whose sum is σ = 42686041200. Its totient is φ = 10713359232.

The previous prime is 21426718571. The next prime is 21426718633. The reversal of 21426718592 is 29581762412.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83697992 + ... + 83698247.

It is an arithmetic number, because the mean of its divisors is an integer number (2667877575).

Almost surely, 2^21426718592 is an apocalyptic number.

It is an amenable number.

21426718592 is a deficient number, since it is larger than the sum of its proper divisors (21259322608).

21426718592 is an equidigital number, since it uses as much as digits as its factorization.

21426718592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167396253 (or 167396241 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The spelling of 21426718592 in words is "twenty-one billion, four hundred twenty-six million, seven hundred eighteen thousand, five hundred ninety-two".