20398185606 has 16 divisors (see below), whose sum is σ = 40799656944. Its totient is φ = 6798847584.

The previous prime is 20398185601. The next prime is 20398185617. The reversal of 20398185606 is 60658189302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20398185601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52165 + ... + 208608.

It is an arithmetic number, because the mean of its divisors is an integer number (2549978559).

Almost surely, 2^20398185606 is an apocalyptic number.

20398185606 is an abundant number, since it is smaller than the sum of its proper divisors (20401471338).

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

20398185606 is a wasteful number, since it uses less digits than its factorization.

20398185606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273815.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 20398185606 in words is "twenty billion, three hundred ninety-eight million, one hundred eighty-five thousand, six hundred six".