20313133231 has 16 divisors (see below), whose sum is σ = 20844538848. Its totient is φ = 19788912000.

The previous prime is 20313133229. The next prime is 20313133271. The reversal of 20313133231 is 13233131302.

It is a cyclic number.

It is not a de Polignac number, because 20313133231 - 2¹ = 20313133229 is a prime.

It is a super-2 number, since 2×20313133231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313133271) 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, 10914241 + ... + 10916101.

It is an arithmetic number, because the mean of its divisors is an integer number (1302783678).

Almost surely, 2^20313133231 is an apocalyptic number.

20313133231 is a deficient number, since it is larger than the sum of its proper divisors (531405617).

20313133231 is a wasteful number, since it uses less digits than its factorization.

20313133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 20313133231 its reverse (13233131302), we get a palindrome (33546264533).

The spelling of 20313133231 in words is "twenty billion, three hundred thirteen million, one hundred thirty-three thousand, two hundred thirty-one".