20400130502 has 16 divisors (see below), whose sum is σ = 30810780000. Its totient is φ = 10129905600.

The previous prime is 20400130493. The next prime is 20400130511. The reversal of 20400130502 is 20503100402.

It is an interprime number because it is at equal distance from previous prime (20400130493) and next prime (20400130511).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1760624 + ... + 1772172.

It is an arithmetic number, because the mean of its divisors is an integer number (1925673750).

Almost surely, 2^20400130502 is an apocalyptic number.

20400130502 is a deficient number, since it is larger than the sum of its proper divisors (10410649498).

20400130502 is a wasteful number, since it uses less digits than its factorization.

20400130502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17551.

The product of its (nonzero) digits is 240, while the sum is 17.

Adding to 20400130502 its reverse (20503100402), we get a palindrome (40903230904).

The spelling of 20400130502 in words is "twenty billion, four hundred million, one hundred thirty thousand, five hundred two".