21455525513323 has 8 divisors (see below), whose sum is σ = 23574416523840. Its totient is φ = 19364699284680.

The previous prime is 21455525513249. The next prime is 21455525513333. The reversal of 21455525513323 is 32331552555412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21455525513323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21455525513333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7016193865 + ... + 7016196922.

It is an arithmetic number, because the mean of its divisors is an integer number (2946802065480).

Almost surely, 2^{21455525513323} is an apocalyptic number.

21455525513323 is a deficient number, since it is larger than the sum of its proper divisors (2118891010517).

21455525513323 is a wasteful number, since it uses less digits than its factorization.

21455525513323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14032390937.

The product of its digits is 2700000, while the sum is 46.

The spelling of 21455525513323 in words is "twenty-one trillion, four hundred fifty-five billion, five hundred twenty-five million, five hundred thirteen thousand, three hundred twenty-three".