21410964623 has 4 divisors (see below), whose sum is σ = 21539174160. Its totient is φ = 21282755088.

The previous prime is 21410964599. The next prime is 21410964637. The reversal of 21410964623 is 32646901412.

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

It is a cyclic number.

It is not a de Polignac number, because 21410964623 - 2²⁴ = 21394187407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410967623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64104518 + ... + 64104851.

It is an arithmetic number, because the mean of its divisors is an integer number (5384793540).

Almost surely, 2^21410964623 is an apocalyptic number.

21410964623 is a deficient number, since it is larger than the sum of its proper divisors (128209537).

21410964623 is a wasteful number, since it uses less digits than its factorization.

21410964623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128209536.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 21410964623 in words is "twenty-one billion, four hundred ten million, nine hundred sixty-four thousand, six hundred twenty-three".