21441297456 has 60 divisors (see below), whose sum is σ = 62228303592. Its totient is φ = 7147097856.

The previous prime is 21441297433. The next prime is 21441297463. The reversal of 21441297456 is 65479214412.

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, 2753481 + ... + 2761256.

Almost surely, 2^21441297456 is an apocalyptic number.

It is an amenable number.

21441297456 is an abundant number, since it is smaller than the sum of its proper divisors (40787006136).

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

21441297456 is an equidigital number, since it uses as much as digits as its factorization.

21441297456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514760 (or 5514742 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

It can be divided in two parts, 2144 and 1297456, that added together give a square (1299600 = 1140²).

The spelling of 21441297456 in words is "twenty-one billion, four hundred forty-one million, two hundred ninety-seven thousand, four hundred fifty-six".