20013202431 has 24 divisors (see below), whose sum is σ = 29804905104. Its totient is φ = 12930969600.

The previous prime is 20013202421. The next prime is 20013202457. The reversal of 20013202431 is 13420231002.

20013202431 is a `hidden beast` number, since 20 + 0 + 13 + 202 + 431 = 666.

It is not a de Polignac number, because 20013202431 - 2¹⁴ = 20013186047 is a prime.

It is a super-2 number, since 2×20013202431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013202421) 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, 31345 + ... + 202506.

It is an arithmetic number, because the mean of its divisors is an integer number (1241871046).

Almost surely, 2^20013202431 is an apocalyptic number.

20013202431 is a deficient number, since it is larger than the sum of its proper divisors (9791702673).

20013202431 is a wasteful number, since it uses less digits than its factorization.

20013202431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234151 (or 234148 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20013202431 its reverse (13420231002), we get a palindrome (33433433433).

The spelling of 20013202431 in words is "twenty billion, thirteen million, two hundred two thousand, four hundred thirty-one".