20663242501 has 24 divisors (see below), whose sum is σ = 25206075360. Its totient is φ = 16749216000.

The previous prime is 20663242499. The next prime is 20663242513. The reversal of 20663242501 is 10524236602.

It is not a de Polignac number, because 20663242501 - 2¹ = 20663242499 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20663242571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110650 + ... + 231451.

It is an arithmetic number, because the mean of its divisors is an integer number (1050253140).

Almost surely, 2^20663242501 is an apocalyptic number.

It is an amenable number.

20663242501 is a deficient number, since it is larger than the sum of its proper divisors (4542832859).

20663242501 is a wasteful number, since it uses less digits than its factorization.

20663242501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342165 (or 342148 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 20663242501 in words is "twenty billion, six hundred sixty-three million, two hundred forty-two thousand, five hundred one".