21939383029344 has 96 divisors (see below), whose sum is σ = 62828565287040. Its totient is φ = 6648070348800.

The previous prime is 21939383029339. The next prime is 21939383029349. The reversal of 21939383029344 is 44392038393912.

It is an interprime number because it is at equal distance from previous prime (21939383029339) and next prime (21939383029349).

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21939383029349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31898359 + ... + 32578889.

It is an arithmetic number, because the mean of its divisors is an integer number (654464221740).

Almost surely, 2^{21939383029344} is an apocalyptic number.

21939383029344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21939383029344 is an abundant number, since it is smaller than the sum of its proper divisors (40889182257696).

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

21939383029344 is a wasteful number, since it uses less digits than its factorization.

21939383029344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711084 (or 711076 counting only the distinct ones).

The product of its (nonzero) digits is 30233088, while the sum is 60.

The spelling of 21939383029344 in words is "twenty-one trillion, nine hundred thirty-nine billion, three hundred eighty-three million, twenty-nine thousand, three hundred forty-four".