20886971652 has 36 divisors (see below), whose sum is σ = 53133927756. Its totient is φ = 6917976000.

The previous prime is 20886971621. The next prime is 20886971659. The reversal of 20886971652 is 25617968802.

It can be written as a sum of positive squares in 2 ways, for example, as 8631153216 + 12255818436 = 92904^2 + 110706^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (20886971659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1842099 + ... + 1853402.

Almost surely, 2^20886971652 is an apocalyptic number.

It is an amenable number.

20886971652 is an abundant number, since it is smaller than the sum of its proper divisors (32246956104).

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

20886971652 is a wasteful number, since it uses less digits than its factorization.

20886971652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3695668 (or 3695663 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 20886971652 in words is "twenty billion, eight hundred eighty-six million, nine hundred seventy-one thousand, six hundred fifty-two".