20133311031 has 24 divisors (see below), whose sum is σ = 31043226240. Its totient is φ = 12536672400.

The previous prime is 20133310997. The next prime is 20133311059. The reversal of 20133311031 is 13011333102.

It is a happy number.

It is not a de Polignac number, because 20133311031 - 2⁷ = 20133310903 is a prime.

It is a super-2 number, since 2×20133311031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20133310995 and 20133311013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133311071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 817005 + ... + 841286.

It is an arithmetic number, because the mean of its divisors is an integer number (1293467760).

Almost surely, 2^20133311031 is an apocalyptic number.

20133311031 is a deficient number, since it is larger than the sum of its proper divisors (10909915209).

20133311031 is a wasteful number, since it uses less digits than its factorization.

20133311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658387 (or 1658384 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 20133311031 its reverse (13011333102), we get a palindrome (33144644133).

The spelling of 20133311031 in words is "twenty billion, one hundred thirty-three million, three hundred eleven thousand, thirty-one".