20646426395 has 32 divisors (see below), whose sum is σ = 28870732800. Its totient is φ = 13880131200.

The previous prime is 20646426389. The next prime is 20646426397. The reversal of 20646426395 is 59362464602.

It is a happy number.

It is not a de Polignac number, because 20646426395 - 2⁸ = 20646426139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20646426397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3148370 + ... + 3154920.

It is an arithmetic number, because the mean of its divisors is an integer number (902210400).

Almost surely, 2^20646426395 is an apocalyptic number.

20646426395 is a deficient number, since it is larger than the sum of its proper divisors (8224306405).

20646426395 is a wasteful number, since it uses less digits than its factorization.

20646426395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8315.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 20646426395 in words is "twenty billion, six hundred forty-six million, four hundred twenty-six thousand, three hundred ninety-five".