20202271985 has 24 divisors (see below), whose sum is σ = 28257408000. Its totient is φ = 13825141344.

The previous prime is 20202271939. The next prime is 20202272003. The reversal of 20202271985 is 58917220202.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20202271985 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39632 + ... + 204878.

It is an arithmetic number, because the mean of its divisors is an integer number (1177392000).

Almost surely, 2^20202271985 is an apocalyptic number.

It is an amenable number.

20202271985 is a deficient number, since it is larger than the sum of its proper divisors (8055136015).

20202271985 is a wasteful number, since it uses less digits than its factorization.

20202271985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165765 (or 165758 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 20202271985 in words is "twenty billion, two hundred two million, two hundred seventy-one thousand, nine hundred eighty-five".