30131320020 has 48 divisors (see below), whose sum is σ = 84460867008. Its totient is φ = 8026145280.

The previous prime is 30131320007. The next prime is 30131320027. The reversal of 30131320020 is 2002313103.

It is a super-2 number, since 2×30131320020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30131320027) 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, 222421 + ... + 331260.

It is an arithmetic number, because the mean of its divisors is an integer number (1759601396).

Almost surely, 2^30131320020 is an apocalyptic number.

30131320020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30131320020 is an abundant number, since it is smaller than the sum of its proper divisors (54329546988).

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

30131320020 is a wasteful number, since it uses less digits than its factorization.

30131320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554600 (or 554598 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 30131320020 its reverse (2002313103), we get a palindrome (32133633123).

The spelling of 30131320020 in words is "thirty billion, one hundred thirty-one million, three hundred twenty thousand, twenty".