20185018692 has 24 divisors (see below), whose sum is σ = 47515179936. Its totient is φ = 6668796288.

The previous prime is 20185018687. The next prime is 20185018709. The reversal of 20185018692 is 29681058102.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7441498 + ... + 7444209.

It is an arithmetic number, because the mean of its divisors is an integer number (1979799164).

Almost surely, 2^20185018692 is an apocalyptic number.

It is an amenable number.

20185018692 is an abundant number, since it is smaller than the sum of its proper divisors (27330161244).

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

20185018692 is a wasteful number, since it uses less digits than its factorization.

20185018692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14885827 (or 14885825 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 20185018692 in words is "twenty billion, one hundred eighty-five million, eighteen thousand, six hundred ninety-two".