20481524077 has 4 divisors (see below), whose sum is σ = 23407456096. Its totient is φ = 17555592060.

The previous prime is 20481524071. The next prime is 20481524093. The reversal of 20481524077 is 77042518402.

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 20481524077 - 2²⁷ = 20347306349 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 (20481524071) 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, 1462965999 + ... + 1462966012.

It is an arithmetic number, because the mean of its divisors is an integer number (5851864024).

Almost surely, 2^20481524077 is an apocalyptic number.

It is an amenable number.

20481524077 is a deficient number, since it is larger than the sum of its proper divisors (2925932019).

20481524077 is an equidigital number, since it uses as much as digits as its factorization.

20481524077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925932018.

The product of its (nonzero) digits is 125440, while the sum is 40.

The spelling of 20481524077 in words is "twenty billion, four hundred eighty-one million, five hundred twenty-four thousand, seventy-seven".