21254524535 has 16 divisors (see below), whose sum is σ = 25626931200. Its totient is φ = 16922702496.

The previous prime is 21254524519. The next prime is 21254524559. The reversal of 21254524535 is 53542545212.

It is a cyclic number.

It is not a de Polignac number, because 21254524535 - 2⁴ = 21254524519 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, 2633336 + ... + 2641394.

It is an arithmetic number, because the mean of its divisors is an integer number (1601683200).

Almost surely, 2^21254524535 is an apocalyptic number.

21254524535 is a deficient number, since it is larger than the sum of its proper divisors (4372406665).

21254524535 is a wasteful number, since it uses less digits than its factorization.

21254524535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10510.

The product of its digits is 240000, while the sum is 38.

The spelling of 21254524535 in words is "twenty-one billion, two hundred fifty-four million, five hundred twenty-four thousand, five hundred thirty-five".