21514622643 has 24 divisors (see below), whose sum is σ = 31474956240. Its totient is φ = 14159523840.

The previous prime is 21514622627. The next prime is 21514622653. The reversal of 21514622643 is 34622641512.

21514622643 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 4 + 6 + 2 + 2 + 643 = 666.

It is not a de Polignac number, because 21514622643 - 2⁴ = 21514622627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21514622598 and 21514622607.

It is not an unprimeable number, because it can be changed into a prime (21514622653) 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 23 ways as a sum of consecutive naturals, for example, 1042303 + ... + 1062743.

It is an arithmetic number, because the mean of its divisors is an integer number (1311456510).

Almost surely, 2^21514622643 is an apocalyptic number.

21514622643 is a deficient number, since it is larger than the sum of its proper divisors (9960333597).

21514622643 is a wasteful number, since it uses less digits than its factorization.

21514622643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21939 (or 21936 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The spelling of 21514622643 in words is "twenty-one billion, five hundred fourteen million, six hundred twenty-two thousand, six hundred forty-three".