20430312131000 has 64 divisors (see below), whose sum is σ = 47811357509760. Its totient is φ = 8171368080000.

The previous prime is 20430312130997. The next prime is 20430312131071. The reversal of 20430312131000 is 13121303402.

It is a super-2 number, since 2×20430312131000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 9920465 + ... + 11801535.

It is an arithmetic number, because the mean of its divisors is an integer number (747052461090).

Almost surely, 2^{20430312131000} is an apocalyptic number.

20430312131000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20430312131000 is an abundant number, since it is smaller than the sum of its proper divisors (27381045378760).

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

20430312131000 is a wasteful number, since it uses less digits than its factorization.

20430312131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891953 (or 1891939 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20430312131000 its reverse (13121303402), we get a palindrome (20443433434402).

The spelling of 20430312131000 in words is "twenty trillion, four hundred thirty billion, three hundred twelve million, one hundred thirty-one thousand".