21346016724 has 48 divisors (see below), whose sum is σ = 56099648640. Its totient is φ = 7017865920.

The previous prime is 21346016723. The next prime is 21346016737. The reversal of 21346016724 is 42761064312.

21346016724 is a `hidden beast` number, since 2 + 13 + 460 + 167 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21346016723) 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, 1345872 + ... + 1361639.

It is an arithmetic number, because the mean of its divisors is an integer number (1168742680).

Almost surely, 2^21346016724 is an apocalyptic number.

It is an amenable number.

21346016724 is an abundant number, since it is smaller than the sum of its proper divisors (34753631916).

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

21346016724 is a wasteful number, since it uses less digits than its factorization.

21346016724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707597 (or 2707589 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 21346016724 in words is "twenty-one billion, three hundred forty-six million, sixteen thousand, seven hundred twenty-four".