21524494607 has 32 divisors (see below), whose sum is σ = 27130028544. Its totient is φ = 16588915200.

The previous prime is 21524494591. The next prime is 21524494613. The reversal of 21524494607 is 70649442512.

It is not a de Polignac number, because 21524494607 - 2⁴ = 21524494591 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21524494657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6268163 + ... + 6271595.

It is an arithmetic number, because the mean of its divisors is an integer number (847813392).

Almost surely, 2^21524494607 is an apocalyptic number.

21524494607 is a deficient number, since it is larger than the sum of its proper divisors (5605533937).

21524494607 is a wasteful number, since it uses less digits than its factorization.

21524494607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 21524494607 in words is "twenty-one billion, five hundred twenty-four million, four hundred ninety-four thousand, six hundred seven".