20405118200860 has 12 divisors (see below), whose sum is σ = 42850748221848. Its totient is φ = 8162047280336.

The previous prime is 20405118200809. The next prime is 20405118200867. The reversal of 20405118200860 is 6800281150402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20405118200867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510127955002 + ... + 510127955041.

It is an arithmetic number, because the mean of its divisors is an integer number (3570895685154).

Almost surely, 2^{20405118200860} is an apocalyptic number.

20405118200860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20405118200860 is an abundant number, since it is smaller than the sum of its proper divisors (22445630020988).

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

20405118200860 is a wasteful number, since it uses less digits than its factorization.

20405118200860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020255910052 (or 1020255910050 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 20405118200860 in words is "twenty trillion, four hundred five billion, one hundred eighteen million, two hundred thousand, eight hundred sixty".