21652432502455 has 16 divisors (see below), whose sum is σ = 26371002055680. Its totient is φ = 17063229424032.

The previous prime is 21652432502429. The next prime is 21652432502471. The reversal of 21652432502455 is 55420523425612.

It is a cyclic number.

It is not a de Polignac number, because 21652432502455 - 2²⁹ = 21651895631543 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37811682 + ... + 38380048.

It is an arithmetic number, because the mean of its divisors is an integer number (1648187628480).

Almost surely, 2^{21652432502455} is an apocalyptic number.

21652432502455 is a deficient number, since it is larger than the sum of its proper divisors (4718569553225).

21652432502455 is a wasteful number, since it uses less digits than its factorization.

21652432502455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682158.

The product of its (nonzero) digits is 2880000, while the sum is 46.

The spelling of 21652432502455 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred thirty-two million, five hundred two thousand, four hundred fifty-five".