20171146495 has 16 divisors (see below), whose sum is σ = 25139515392. Its totient is φ = 15520546080.

The previous prime is 20171146469. The next prime is 20171146517. The reversal of 20171146495 is 59464117102.

It is a happy number.

It is not a de Polignac number, because 20171146495 - 2¹⁵ = 20171113727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373927 + ... + 424456.

It is an arithmetic number, because the mean of its divisors is an integer number (1571219712).

Almost surely, 2^20171146495 is an apocalyptic number.

20171146495 is a deficient number, since it is larger than the sum of its proper divisors (4968368897).

20171146495 is a wasteful number, since it uses less digits than its factorization.

20171146495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798582.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 20171146495 in words is "twenty billion, one hundred seventy-one million, one hundred forty-six thousand, four hundred ninety-five".