20271265650 has 36 divisors (see below), whose sum is σ = 54462134922. Its totient is φ = 5405670720.

The previous prime is 20271265649. The next prime is 20271265657. The reversal of 20271265650 is 5656217202.

20271265650 is a `hidden beast` number, since 2 + 0 + 2 + 71 + 26 + 565 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 9517368249 + 10753897401 = 97557^2 + 103701^2 .

It is a super-2 number, since 2×20271265650² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20271265657) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22523179 + ... + 22524078.

Almost surely, 2^20271265650 is an apocalyptic number.

20271265650 is an abundant number, since it is smaller than the sum of its proper divisors (34190869272).

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

20271265650 is a wasteful number, since it uses less digits than its factorization.

20271265650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45047275 (or 45047267 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 20271265650 in words is "twenty billion, two hundred seventy-one million, two hundred sixty-five thousand, six hundred fifty".