21713272454 has 16 divisors (see below), whose sum is σ = 32645991600. Its totient is φ = 10831306464.

The previous prime is 21713272439. The next prime is 21713272481. The reversal of 21713272454 is 45427231712.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1563212 + ... + 1577040.

It is an arithmetic number, because the mean of its divisors is an integer number (2040374475).

Almost surely, 2^21713272454 is an apocalyptic number.

21713272454 is a deficient number, since it is larger than the sum of its proper divisors (10932719146).

21713272454 is a wasteful number, since it uses less digits than its factorization.

21713272454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15607.

The product of its digits is 94080, while the sum is 38.

The spelling of 21713272454 in words is "twenty-one billion, seven hundred thirteen million, two hundred seventy-two thousand, four hundred fifty-four".