20115052541 has 4 divisors (see below), whose sum is σ = 20118243132. Its totient is φ = 20111861952.

The previous prime is 20115052513. The next prime is 20115052589. The reversal of 20115052541 is 14525051102.

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 16862061316 + 3252991225 = 129854^2 + 57035^2 .

It is a cyclic number.

It is not a de Polignac number, because 20115052541 - 2²⁶ = 20047943677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20115052541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115054541) 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, 1585820 + ... + 1598453.

It is an arithmetic number, because the mean of its divisors is an integer number (5029560783).

Almost surely, 2^20115052541 is an apocalyptic number.

It is an amenable number.

20115052541 is a deficient number, since it is larger than the sum of its proper divisors (3190591).

20115052541 is an equidigital number, since it uses as much as digits as its factorization.

20115052541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190590.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 20115052541 in words is "twenty billion, one hundred fifteen million, fifty-two thousand, five hundred forty-one".