20032970661 has 18 divisors (see below), whose sum is σ = 31806251750. Its totient is φ = 12141193680.

The previous prime is 20032970621. The next prime is 20032970689. The reversal of 20032970661 is 16607923002.

20032970661 is a `hidden beast` number, since 200 + 329 + 70 + 6 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16716938436 + 3316032225 = 129294^2 + 57585^2 .

It is not a de Polignac number, because 20032970661 - 2⁹ = 20032970149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032970621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9196786 + ... + 9198963.

Almost surely, 2^20032970661 is an apocalyptic number.

It is an amenable number.

20032970661 is a deficient number, since it is larger than the sum of its proper divisors (11773281089).

20032970661 is a wasteful number, since it uses less digits than its factorization.

20032970661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18395777 (or 18395763 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 20032970661 in words is "twenty billion, thirty-two million, nine hundred seventy thousand, six hundred sixty-one".