20258550537 has 4 divisors (see below), whose sum is σ = 27011400720. Its totient is φ = 13505700356.

The previous prime is 20258550511. The next prime is 20258550553. The reversal of 20258550537 is 73505585202.

It is a happy number.

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 20258550537 - 2⁷ = 20258550409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20258550337) 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, 3376425087 + ... + 3376425092.

It is an arithmetic number, because the mean of its divisors is an integer number (6752850180).

Almost surely, 2^20258550537 is an apocalyptic number.

It is an amenable number.

20258550537 is a deficient number, since it is larger than the sum of its proper divisors (6752850183).

20258550537 is an equidigital number, since it uses as much as digits as its factorization.

20258550537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752850182.

The product of its (nonzero) digits is 420000, while the sum is 42.

The spelling of 20258550537 in words is "twenty billion, two hundred fifty-eight million, five hundred fifty thousand, five hundred thirty-seven".