20132655637 has 4 divisors (see below), whose sum is σ = 21316929516. Its totient is φ = 18948381760.

The previous prime is 20132655629. The next prime is 20132655661. The reversal of 20132655637 is 73655623102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13162743441 + 6969912196 = 114729^2 + 83486^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132655637 - 2³ = 20132655629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20132655637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132655617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592136914 + ... + 592136947.

It is an arithmetic number, because the mean of its divisors is an integer number (5329232379).

Almost surely, 2^20132655637 is an apocalyptic number.

It is an amenable number.

20132655637 is a deficient number, since it is larger than the sum of its proper divisors (1184273879).

20132655637 is a wasteful number, since it uses less digits than its factorization.

20132655637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184273878.

The product of its (nonzero) digits is 226800, while the sum is 40.

The spelling of 20132655637 in words is "twenty billion, one hundred thirty-two million, six hundred fifty-five thousand, six hundred thirty-seven".