21750272413 has 8 divisors (see below), whose sum is σ = 23125263480. Its totient is φ = 20385899520.

The previous prime is 21750272407. The next prime is 21750272441. The reversal of 21750272413 is 31427205712.

It can be written as a sum of positive squares in 4 ways, for example, as 5416665604 + 16333606809 = 73598^2 + 127803^2 .

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

It is not a de Polignac number, because 21750272413 - 2⁵ = 21750272381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21750872413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2650318 + ... + 2658511.

It is an arithmetic number, because the mean of its divisors is an integer number (2890657935).

Almost surely, 2^21750272413 is an apocalyptic number.

It is an amenable number.

21750272413 is a deficient number, since it is larger than the sum of its proper divisors (1374991067).

21750272413 is a wasteful number, since it uses less digits than its factorization.

21750272413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5309087.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 21750272413 in words is "twenty-one billion, seven hundred fifty million, two hundred seventy-two thousand, four hundred thirteen".