20113212134040 has 64 divisors (see below), whose sum is σ = 60345960111360. Its totient is φ = 5362961128320.

The previous prime is 20113212134021. The next prime is 20113212134101. The reversal of 20113212134040 is 4043121231102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20113212134040.

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, 7632516 + ... + 9923795.

It is an arithmetic number, because the mean of its divisors is an integer number (942905626740).

Almost surely, 2^{20113212134040} is an apocalyptic number.

20113212134040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113212134040 is an abundant number, since it is smaller than the sum of its proper divisors (40232747977320).

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

20113212134040 is a wasteful number, since it uses less digits than its factorization.

20113212134040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17565872 (or 17565868 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20113212134040 its reverse (4043121231102), we get a palindrome (24156333365142).

The spelling of 20113212134040 in words is "twenty trillion, one hundred thirteen billion, two hundred twelve million, one hundred thirty-four thousand, forty".