20020400013 has 16 divisors (see below), whose sum is σ = 28275181056. Its totient is φ = 12556892160.

The previous prime is 20020400003. The next prime is 20020400017. The reversal of 20020400013 is 31000402002.

It is not a de Polignac number, because 20020400013 - 2²⁴ = 20003622797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020400017) 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, 56548 + ... + 207938.

It is an arithmetic number, because the mean of its divisors is an integer number (1767198816).

Almost surely, 2^20020400013 is an apocalyptic number.

It is an amenable number.

20020400013 is a deficient number, since it is larger than the sum of its proper divisors (8254781043).

20020400013 is a wasteful number, since it uses less digits than its factorization.

20020400013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154004.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20020400013 its reverse (31000402002), we get a palindrome (51020802015).

The spelling of 20020400013 in words is "twenty billion, twenty million, four hundred thousand, thirteen".