21235474365 has 32 divisors (see below), whose sum is σ = 39047546880. Its totient is φ = 9653404224.

The previous prime is 21235474327. The next prime is 21235474397. The reversal of 21235474365 is 56347453212.

It is not a de Polignac number, because 21235474365 - 2¹⁶ = 21235408829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 546129 + ... + 583718.

It is an arithmetic number, because the mean of its divisors is an integer number (1220235840).

Almost surely, 2^21235474365 is an apocalyptic number.

It is an amenable number.

21235474365 is a deficient number, since it is larger than the sum of its proper divisors (17812072515).

21235474365 is a wasteful number, since it uses less digits than its factorization.

21235474365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130041.

The product of its digits is 604800, while the sum is 42.

The spelling of 21235474365 in words is "twenty-one billion, two hundred thirty-five million, four hundred seventy-four thousand, three hundred sixty-five".