20015510601 has 4 divisors (see below), whose sum is σ = 26687347472. Its totient is φ = 13343673732.

The previous prime is 20015510591. The next prime is 20015510611. The reversal of 20015510601 is 10601551002.

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 an interprime number because it is at equal distance from previous prime (20015510591) and next prime (20015510611).

It is not a de Polignac number, because 20015510601 - 2²¹ = 20013413449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20015510611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335918431 + ... + 3335918436.

It is an arithmetic number, because the mean of its divisors is an integer number (6671836868).

Almost surely, 2^20015510601 is an apocalyptic number.

It is an amenable number.

20015510601 is a deficient number, since it is larger than the sum of its proper divisors (6671836871).

20015510601 is an equidigital number, since it uses as much as digits as its factorization.

20015510601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6671836870.

The product of its (nonzero) digits is 300, while the sum is 21.

The spelling of 20015510601 in words is "twenty billion, fifteen million, five hundred ten thousand, six hundred one".