21514622645 has 8 divisors (see below), whose sum is σ = 25918006104. Its totient is φ = 17144725504.

The previous prime is 21514622627. The next prime is 21514622653. The reversal of 21514622645 is 54622641512.

It can be written as a sum of positive squares in 4 ways, for example, as 9004871236 + 12509751409 = 94894^2 + 111847^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21514622645 - 2¹⁸ = 21514360501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21514622599 and 21514622608.

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, 8370164 + ... + 8372733.

It is an arithmetic number, because the mean of its divisors is an integer number (3239750763).

Almost surely, 2^21514622645 is an apocalyptic number.

It is an amenable number.

21514622645 is a deficient number, since it is larger than the sum of its proper divisors (4403383459).

21514622645 is a wasteful number, since it uses less digits than its factorization.

21514622645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16743159.

The product of its digits is 115200, while the sum is 38.

The spelling of 21514622645 in words is "twenty-one billion, five hundred fourteen million, six hundred twenty-two thousand, six hundred forty-five".