21274162446 has 8 divisors (see below), whose sum is σ = 42548324904. Its totient is φ = 7091387480.

The previous prime is 21274162411. The next prime is 21274162447. The reversal of 21274162446 is 64426147212.

It is a sphenic number, since it is the product of 3 distinct primes.

21274162446 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274162447) 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, 1772846865 + ... + 1772846876.

It is an arithmetic number, because the mean of its divisors is an integer number (5318540613).

Almost surely, 2^21274162446 is an apocalyptic number.

21274162446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21274162446 is a wasteful number, since it uses less digits than its factorization.

21274162446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545693746.

The product of its digits is 129024, while the sum is 39.

The spelling of 21274162446 in words is "twenty-one billion, two hundred seventy-four million, one hundred sixty-two thousand, four hundred forty-six".