20550651001 has 4 divisors (see below), whose sum is σ = 20657131252. Its totient is φ = 20444170752.

The previous prime is 20550650987. The next prime is 20550651007. The reversal of 20550651001 is 10015605502.

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 7163929600 + 13386721401 = 84640^2 + 115701^2 .

It is a cyclic number.

It is not a de Polignac number, because 20550651001 - 2⁵ = 20550650969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20550651007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53239836 + ... + 53240221.

It is an arithmetic number, because the mean of its divisors is an integer number (5164282813).

Almost surely, 2^20550651001 is an apocalyptic number.

It is an amenable number.

20550651001 is a deficient number, since it is larger than the sum of its proper divisors (106480251).

20550651001 is a wasteful number, since it uses less digits than its factorization.

20550651001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106480250.

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 20550651001 in words is "twenty billion, five hundred fifty million, six hundred fifty-one thousand, one".