20405118200870 has 16 divisors (see below), whose sum is σ = 39554536820400. Its totient is φ = 7534197489504.

The previous prime is 20405118200867. The next prime is 20405118200911. The reversal of 20405118200870 is 7800281150402.

It is a super-2 number, since 2×20405118200870² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78481223720 + ... + 78481223979.

It is an arithmetic number, because the mean of its divisors is an integer number (2472158551275).

Almost surely, 2^{20405118200870} is an apocalyptic number.

20405118200870 is a deficient number, since it is larger than the sum of its proper divisors (19149418619530).

20405118200870 is a wasteful number, since it uses less digits than its factorization.

20405118200870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156962447719.

The product of its (nonzero) digits is 35840, while the sum is 38.

The spelling of 20405118200870 in words is "twenty trillion, four hundred five billion, one hundred eighteen million, two hundred thousand, eight hundred seventy".