21425212774246 has 16 divisors (see below), whose sum is σ = 32655548358576. Its totient is φ = 10540403127936.

The previous prime is 21425212774157. The next prime is 21425212774253. The reversal of 21425212774246 is 64247721252412.

It is a self number, because there is not a number n which added to its sum of digits gives 21425212774246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93169671 + ... + 93399346.

It is an arithmetic number, because the mean of its divisors is an integer number (2040971772411).

Almost surely, 2^{21425212774246} is an apocalyptic number.

21425212774246 is a deficient number, since it is larger than the sum of its proper divisors (11230335584330).

21425212774246 is a wasteful number, since it uses less digits than its factorization.

21425212774246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186569943.

The product of its digits is 3010560, while the sum is 49.

The spelling of 21425212774246 in words is "twenty-one trillion, four hundred twenty-five billion, two hundred twelve million, seven hundred seventy-four thousand, two hundred forty-six".