21344700472 has 64 divisors (see below), whose sum is σ = 44649792000. Its totient is φ = 9506520576.

The previous prime is 21344700463. The next prime is 21344700589. The reversal of 21344700472 is 27400744312.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3063729 + ... + 3070687.

It is an arithmetic number, because the mean of its divisors is an integer number (697653000).

Almost surely, 2^21344700472 is an apocalyptic number.

It is an amenable number.

21344700472 is an abundant number, since it is smaller than the sum of its proper divisors (23305091528).

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

21344700472 is a wasteful number, since it uses less digits than its factorization.

21344700472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8188 (or 8184 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 34.

The spelling of 21344700472 in words is "twenty-one billion, three hundred forty-four million, seven hundred thousand, four hundred seventy-two".