20406170800 has 30 divisors (see below), whose sum is σ = 49025826308. Its totient is φ = 8162468160.

The previous prime is 20406170749. The next prime is 20406170801. The reversal of 20406170800 is 807160402.

It is not an unprimeable number, because it can be changed into a prime (20406170801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25507314 + ... + 25508113.

Almost surely, 2^20406170800 is an apocalyptic number.

20406170800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20406170800 is an abundant number, since it is smaller than the sum of its proper divisors (28619655508).

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

20406170800 is a wasteful number, since it uses less digits than its factorization.

20406170800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51015445 (or 51015434 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The spelling of 20406170800 in words is "twenty billion, four hundred six million, one hundred seventy thousand, eight hundred".