20202103131 has 12 divisors (see below), whose sum is σ = 31333874472. Its totient is φ = 11544058848.

The previous prime is 20202103127. The next prime is 20202103133. The reversal of 20202103131 is 13130120202.

It is not a de Polignac number, because 20202103131 - 2² = 20202103127 is a prime.

It is a super-2 number, since 2×20202103131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20202103131.

It is not an unprimeable number, because it can be changed into a prime (20202103133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68714490 + ... + 68714783.

It is an arithmetic number, because the mean of its divisors is an integer number (2611156206).

Almost surely, 2^20202103131 is an apocalyptic number.

20202103131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20202103131 is a deficient number, since it is larger than the sum of its proper divisors (11131771341).

20202103131 is a wasteful number, since it uses less digits than its factorization.

20202103131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137429290 (or 137429283 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20202103131 its reverse (13130120202), we get a palindrome (33332223333).

The spelling of 20202103131 in words is "twenty billion, two hundred two million, one hundred three thousand, one hundred thirty-one".