20495874151 has 4 divisors (see below), whose sum is σ = 20507118912. Its totient is φ = 20484629392.

The previous prime is 20495874083. The next prime is 20495874181. The reversal of 20495874151 is 15147859402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20495874151 - 2⁹ = 20495873639 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 (20495874181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5619646 + ... + 5623291.

It is an arithmetic number, because the mean of its divisors is an integer number (5126779728).

Almost surely, 2^20495874151 is an apocalyptic number.

20495874151 is a deficient number, since it is larger than the sum of its proper divisors (11244761).

20495874151 is a wasteful number, since it uses less digits than its factorization.

20495874151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11244760.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 20495874151 in words is "twenty billion, four hundred ninety-five million, eight hundred seventy-four thousand, one hundred fifty-one".