20500002541 has 4 divisors (see below), whose sum is σ = 20547566784. Its totient is φ = 20452438300.

The previous prime is 20500002527. The next prime is 20500002673. The reversal of 20500002541 is 14520000502.

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 20500002541 - 2¹⁵ = 20499969773 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 (20500002521) 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, 23781475 + ... + 23782336.

It is an arithmetic number, because the mean of its divisors is an integer number (5136891696).

Almost surely, 2^20500002541 is an apocalyptic number.

It is an amenable number.

20500002541 is a deficient number, since it is larger than the sum of its proper divisors (47564243).

20500002541 is an equidigital number, since it uses as much as digits as its factorization.

20500002541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47564242.

The product of its (nonzero) digits is 400, while the sum is 19.

The spelling of 20500002541 in words is "twenty billion, five hundred million, two thousand, five hundred forty-one".