21524240001 has 12 divisors (see below), whose sum is σ = 31545167696. Its totient is φ = 13044993720.

The previous prime is 21524239969. The next prime is 21524240011. The reversal of 21524240001 is 10004242512.

It is not a de Polignac number, because 21524240001 - 2⁵ = 21524239969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21524240001.

It is not an unprimeable number, because it can be changed into a prime (21524240011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29647351 + ... + 29648076.

Almost surely, 2^21524240001 is an apocalyptic number.

It is an amenable number.

21524240001 is a deficient number, since it is larger than the sum of its proper divisors (10020927695).

21524240001 is a wasteful number, since it uses less digits than its factorization.

21524240001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59295452 (or 59295441 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 21524240001 its reverse (10004242512), we get a palindrome (31528482513).

The spelling of 21524240001 in words is "twenty-one billion, five hundred twenty-four million, two hundred forty thousand, one".