20650960157 has 4 divisors (see below), whose sum is σ = 21090342336. Its totient is φ = 20211577980.

The previous prime is 20650960147. The next prime is 20650960163. The reversal of 20650960157 is 75106905602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20650960157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20650960147) 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, 219691019 + ... + 219691112.

It is an arithmetic number, because the mean of its divisors is an integer number (5272585584).

Almost surely, 2^20650960157 is an apocalyptic number.

It is an amenable number.

20650960157 is a deficient number, since it is larger than the sum of its proper divisors (439382179).

20650960157 is an equidigital number, since it uses as much as digits as its factorization.

20650960157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439382178.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 20650960157 in words is "twenty billion, six hundred fifty million, nine hundred sixty thousand, one hundred fifty-seven".