20445676157 has 4 divisors (see below), whose sum is σ = 20446098240. Its totient is φ = 20445254076.

The previous prime is 20445676151. The next prime is 20445676169. The reversal of 20445676157 is 75167654402.

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 not a de Polignac number, because 20445676157 - 2¹² = 20445672061 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 (20445676151) 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, 127307 + ... + 238952.

It is an arithmetic number, because the mean of its divisors is an integer number (5111524560).

Almost surely, 2^20445676157 is an apocalyptic number.

It is an amenable number.

20445676157 is a deficient number, since it is larger than the sum of its proper divisors (422083).

20445676157 is an equidigital number, since it uses as much as digits as its factorization.

20445676157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422082.

The product of its (nonzero) digits is 1411200, while the sum is 47.

The spelling of 20445676157 in words is "twenty billion, four hundred forty-five million, six hundred seventy-six thousand, one hundred fifty-seven".