20130233031 has 48 divisors (see below), whose sum is σ = 30956365440. Its totient is φ = 12569618880.

The previous prime is 20130233027. The next prime is 20130233077. The reversal of 20130233031 is 13033203102.

20130233031 is a `hidden beast` number, since 2 + 0 + 1 + 302 + 330 + 31 = 666.

It is not a de Polignac number, because 20130233031 - 2² = 20130233027 is a prime.

It is a super-2 number, since 2×20130233031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20130232995 and 20130233013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130233021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6561960 + ... + 6565026.

It is an arithmetic number, because the mean of its divisors is an integer number (644924280).

Almost surely, 2^20130233031 is an apocalyptic number.

20130233031 is a deficient number, since it is larger than the sum of its proper divisors (10826132409).

20130233031 is a wasteful number, since it uses less digits than its factorization.

20130233031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516 (or 3513 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 20130233031 its reverse (13033203102), we get a palindrome (33163436133).

The spelling of 20130233031 in words is "twenty billion, one hundred thirty million, two hundred thirty-three thousand, thirty-one".