21323246522455 has 4 divisors (see below), whose sum is σ = 25587895826952. Its totient is φ = 17058597217960.

The previous prime is 21323246522449. The next prime is 21323246522483. The reversal of 21323246522455 is 55422564232312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21323246522455 - 2¹⁵ = 21323246489687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2132324652241 + ... + 2132324652250.

It is an arithmetic number, because the mean of its divisors is an integer number (6396973956738).

Almost surely, 2^{21323246522455} is an apocalyptic number.

21323246522455 is a deficient number, since it is larger than the sum of its proper divisors (4264649304497).

21323246522455 is an equidigital number, since it uses as much as digits as its factorization.

21323246522455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264649304496.

The product of its digits is 3456000, while the sum is 46.

The spelling of 21323246522455 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred forty-six million, five hundred twenty-two thousand, four hundred fifty-five".