21446511564412 has 36 divisors (see below), whose sum is σ = 43211669391576. Its totient is φ = 9235339901280.

The previous prime is 21446511564239. The next prime is 21446511564449.

21446511564412 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 675082063 + ... + 675113830.

It is an arithmetic number, because the mean of its divisors is an integer number (1200324149766).

Almost surely, 2^{21446511564412} is an apocalyptic number.

21446511564412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21446511564412 is an abundant number, since it is smaller than the sum of its proper divisors (21765157827164).

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

21446511564412 is a wasteful number, since it uses less digits than its factorization.

21446511564412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350195946 (or 1350195925 counting only the distinct ones).

The product of its digits is 921600, while the sum is 46.

The spelling of 21446511564412 in words is "twenty-one trillion, four hundred forty-six billion, five hundred eleven million, five hundred sixty-four thousand, four hundred twelve".