20124440013 has 16 divisors (see below), whose sum is σ = 28770612480. Its totient is φ = 12467260416.

The previous prime is 20124439997. The next prime is 20124440027. The reversal of 20124440013 is 31004442102.

It is not a de Polignac number, because 20124440013 - 2⁴ = 20124439997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124440513) 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, 2493420 + ... + 2501477.

It is an arithmetic number, because the mean of its divisors is an integer number (1798163280).

Almost surely, 2^20124440013 is an apocalyptic number.

It is an amenable number.

20124440013 is a deficient number, since it is larger than the sum of its proper divisors (8646172467).

20124440013 is a wasteful number, since it uses less digits than its factorization.

20124440013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4994996.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20124440013 its reverse (31004442102), we get a palindrome (51128882115).

The spelling of 20124440013 in words is "twenty billion, one hundred twenty-four million, four hundred forty thousand, thirteen".