20873434140870 has 64 divisors (see below), whose sum is σ = 53212546814400. Its totient is φ = 5222085193728.

The previous prime is 20873434140869. The next prime is 20873434140899. The reversal of 20873434140870 is 7804143437802.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65221045 + ... + 65540304.

It is an arithmetic number, because the mean of its divisors is an integer number (831446043975).

Almost surely, 2^{20873434140870} is an apocalyptic number.

20873434140870 is an abundant number, since it is smaller than the sum of its proper divisors (32339112673530).

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

20873434140870 is a wasteful number, since it uses less digits than its factorization.

20873434140870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130761689.

The product of its (nonzero) digits is 3612672, while the sum is 51.

The spelling of 20873434140870 in words is "twenty trillion, eight hundred seventy-three billion, four hundred thirty-four million, one hundred forty thousand, eight hundred seventy".