21426054465 has 64 divisors (see below), whose sum is σ = 37225889280. Its totient is φ = 10483630080.

The previous prime is 21426054451. The next prime is 21426054469. The reversal of 21426054465 is 56445062412.

It is not a de Polignac number, because 21426054465 - 2⁶ = 21426054401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21426054469) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1604697 + ... + 1617993.

It is an arithmetic number, because the mean of its divisors is an integer number (581654520).

Almost surely, 2^21426054465 is an apocalyptic number.

It is an amenable number.

21426054465 is a deficient number, since it is larger than the sum of its proper divisors (15799834815).

21426054465 is a wasteful number, since it uses less digits than its factorization.

21426054465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13482.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 21426054465 in words is "twenty-one billion, four hundred twenty-six million, fifty-four thousand, four hundred sixty-five".