20133131012 has 12 divisors (see below), whose sum is σ = 36185222220. Its totient is φ = 9794496096.

The previous prime is 20133131003. The next prime is 20133131089. The reversal of 20133131012 is 21013133102.

It can be written as a sum of positive squares in 2 ways, for example, as 17186161216 + 2946969796 = 131096^2 + 54286^2 .

It is a super-2 number, since 2×20133131012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68017187 + ... + 68017482.

It is an arithmetic number, because the mean of its divisors is an integer number (3015435185).

Almost surely, 2^20133131012 is an apocalyptic number.

It is an amenable number.

20133131012 is a deficient number, since it is larger than the sum of its proper divisors (16052091208).

20133131012 is a wasteful number, since it uses less digits than its factorization.

20133131012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136034710 (or 136034708 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20133131012 its reverse (21013133102), we get a palindrome (41146264114).

The spelling of 20133131012 in words is "twenty billion, one hundred thirty-three million, one hundred thirty-one thousand, twelve".