20123131031000 has 64 divisors (see below), whose sum is σ = 47199975881760. Its totient is φ = 8030132880000.

The previous prime is 20123131030993. The next prime is 20123131031041. The reversal of 20123131031000 is 13013132102.

It is a super-2 number, since 2×20123131031000² (a number of 27 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 20123131031000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23478206 + ... + 24320205.

Almost surely, 2^{20123131031000} is an apocalyptic number.

20123131031000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123131031000 is an abundant number, since it is smaller than the sum of its proper divisors (27076844850760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123131031000 is a wasteful number, since it uses less digits than its factorization.

20123131031000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47798853 (or 47798839 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20123131031000 its reverse (13013132102), we get a palindrome (20136144163102).

The spelling of 20123131031000 in words is "twenty trillion, one hundred twenty-three billion, one hundred thirty-one million, thirty-one thousand".