33131011020 has 48 divisors (see below), whose sum is σ = 96800175360. Its totient is φ = 8450808256.

The previous prime is 33131010977. The next prime is 33131011027. The reversal of 33131011020 is 2011013133.

It is a super-2 number, since 2×33131011020² (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 not an unprimeable number, because it can be changed into a prime (33131011027) 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, 12002610 + ... + 12005369.

It is an arithmetic number, because the mean of its divisors is an integer number (2016670320).

Almost surely, 2^33131011020 is an apocalyptic number.

33131011020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33131011020 is an abundant number, since it is smaller than the sum of its proper divisors (63669164340).

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

33131011020 is a wasteful number, since it uses less digits than its factorization.

33131011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24008014 (or 24008012 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 33131011020 its reverse (2011013133), we get a palindrome (35142024153).

The spelling of 33131011020 in words is "thirty-three billion, one hundred thirty-one million, eleven thousand, twenty".