21719274735 has 16 divisors (see below), whose sum is σ = 35088228864. Its totient is φ = 11471150112.

The previous prime is 21719274719. The next prime is 21719274751. The reversal of 21719274735 is 53747291712.

It is an interprime number because it is at equal distance from previous prime (21719274719) and next prime (21719274751).

It is not a de Polignac number, because 21719274735 - 2⁴ = 21719274719 is a prime.

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, 7027347 + ... + 7030436.

It is an arithmetic number, because the mean of its divisors is an integer number (2193014304).

Almost surely, 2^21719274735 is an apocalyptic number.

21719274735 is a deficient number, since it is larger than the sum of its proper divisors (13368954129).

21719274735 is a wasteful number, since it uses less digits than its factorization.

21719274735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14057894.

The product of its digits is 740880, while the sum is 48.

The spelling of 21719274735 in words is "twenty-one billion, seven hundred nineteen million, two hundred seventy-four thousand, seven hundred thirty-five".