20887006148137 has 4 divisors (see below), whose sum is σ = 20892330395280. Its totient is φ = 20881681900996.

The previous prime is 20887006148131. The next prime is 20887006148167. The reversal of 20887006148137 is 73184160078802.

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 20887006148137 - 2²⁷ = 20886871930409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20887006148131) 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, 2662117687 + ... + 2662125532.

It is an arithmetic number, because the mean of its divisors is an integer number (5223082598820).

Almost surely, 2^{20887006148137} is an apocalyptic number.

It is an amenable number.

20887006148137 is a deficient number, since it is larger than the sum of its proper divisors (5324247143).

20887006148137 is an equidigital number, since it uses as much as digits as its factorization.

20887006148137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324247142.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 20887006148137 in words is "twenty trillion, eight hundred eighty-seven billion, six million, one hundred forty-eight thousand, one hundred thirty-seven".