213131404020 has 48 divisors (see below), whose sum is σ = 596835102528. Its totient is φ = 56828643840.

The previous prime is 213131404019. The next prime is 213131404097. The reversal of 213131404020 is 20404131312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350092 + ... + 740828.

It is an arithmetic number, because the mean of its divisors is an integer number (12434064636).

Almost surely, 2^213131404020 is an apocalyptic number.

213131404020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213131404020 is an abundant number, since it is smaller than the sum of its proper divisors (383703698508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213131404020 is a wasteful number, since it uses less digits than its factorization.

213131404020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399840 (or 399838 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 213131404020 its reverse (20404131312), we get a palindrome (233535535332).

The spelling of 213131404020 in words is "two hundred thirteen billion, one hundred thirty-one million, four hundred four thousand, twenty".