20848513021 has 16 divisors (see below), whose sum is σ = 25329260160. Its totient is φ = 16761988800.

The previous prime is 20848512991. The next prime is 20848513031. The reversal of 20848513021 is 12031584802.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20848513021 - 2²³ = 20840124413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20848513031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 762586 + ... + 789451.

It is an arithmetic number, because the mean of its divisors is an integer number (1583078760).

Almost surely, 2^20848513021 is an apocalyptic number.

It is an amenable number.

20848513021 is a deficient number, since it is larger than the sum of its proper divisors (4480747139).

20848513021 is a wasteful number, since it uses less digits than its factorization.

20848513021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552164.

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 20848513021 in words is "twenty billion, eight hundred forty-eight million, five hundred thirteen thousand, twenty-one".