21446515052 has 24 divisors (see below), whose sum is σ = 38414582976. Its totient is φ = 10471054608.

The previous prime is 21446515039. The next prime is 21446515063. The reversal of 21446515052 is 25051564412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715103 + ... + 744489.

It is an arithmetic number, because the mean of its divisors is an integer number (1600607624).

Almost surely, 2^21446515052 is an apocalyptic number.

It is an amenable number.

21446515052 is a deficient number, since it is larger than the sum of its proper divisors (16968067924).

21446515052 is a wasteful number, since it uses less digits than its factorization.

21446515052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33677 (or 33675 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 21446515052 in words is "twenty-one billion, four hundred forty-six million, five hundred fifteen thousand, fifty-two".