21514368993 has 64 divisors (see below), whose sum is σ = 32273203200. Its totient is φ = 12659328000.

The previous prime is 21514368991. The next prime is 21514369001. The reversal of 21514368993 is 39986341512.

It is not a de Polignac number, because 21514368993 - 2¹ = 21514368991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21514368991) 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 63 ways as a sum of consecutive naturals, for example, 53651593 + ... + 53651993.

It is an arithmetic number, because the mean of its divisors is an integer number (504268800).

Almost surely, 2^21514368993 is an apocalyptic number.

It is an amenable number.

21514368993 is a deficient number, since it is larger than the sum of its proper divisors (10758834207).

21514368993 is a wasteful number, since it uses less digits than its factorization.

21514368993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870.

The product of its digits is 1399680, while the sum is 51.

The spelling of 21514368993 in words is "twenty-one billion, five hundred fourteen million, three hundred sixty-eight thousand, nine hundred ninety-three".