20262261188 has 12 divisors (see below), whose sum is σ = 38186569260. Its totient is φ = 9351812832.

The previous prime is 20262261139. The next prime is 20262261193. The reversal of 20262261188 is 88116226202.

It can be written as a sum of positive squares in 2 ways, for example, as 13775247424 + 6487013764 = 117368^2 + 80542^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194829383 + ... + 194829486.

It is an arithmetic number, because the mean of its divisors is an integer number (3182214105).

Almost surely, 2^20262261188 is an apocalyptic number.

It is an amenable number.

20262261188 is a deficient number, since it is larger than the sum of its proper divisors (17924308072).

20262261188 is a wasteful number, since it uses less digits than its factorization.

20262261188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389658886 (or 389658884 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 20262261188 in words is "twenty billion, two hundred sixty-two million, two hundred sixty-one thousand, one hundred eighty-eight".