21444455451012 has 96 divisors (see below), whose sum is σ = 57545588588544. Its totient is φ = 6154894502400.

The previous prime is 21444455450953. The next prime is 21444455451047. The reversal of 21444455451012 is 21015455444412.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55558533 + ... + 55943180.

It is an arithmetic number, because the mean of its divisors is an integer number (599433214464).

Almost surely, 2^{21444455451012} is an apocalyptic number.

21444455451012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21444455451012 is an abundant number, since it is smaller than the sum of its proper divisors (36101133137532).

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

21444455451012 is a wasteful number, since it uses less digits than its factorization.

21444455451012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111501809 (or 111501807 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 42.

The spelling of 21444455451012 in words is "twenty-one trillion, four hundred forty-four billion, four hundred fifty-five million, four hundred fifty-one thousand, twelve".