20427761895 has 32 divisors (see below), whose sum is σ = 33588886464. Its totient is φ = 10595020800.

The previous prime is 20427761869. The next prime is 20427761909. The reversal of 20427761895 is 59816772402.

It is a happy number.

It is not a de Polignac number, because 20427761895 - 2²⁹ = 19890890983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139435 + ... + 245555.

It is an arithmetic number, because the mean of its divisors is an integer number (1049652702).

Almost surely, 2^20427761895 is an apocalyptic number.

20427761895 is a deficient number, since it is larger than the sum of its proper divisors (13161124569).

20427761895 is a wasteful number, since it uses less digits than its factorization.

20427761895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106483.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 20427761895 in words is "twenty billion, four hundred twenty-seven million, seven hundred sixty-one thousand, eight hundred ninety-five".