21768625323 has 12 divisors (see below), whose sum is σ = 31601580400. Its totient is φ = 14439488976.

The previous prime is 21768625283. The next prime is 21768625339. The reversal of 21768625323 is 32352686712.

21768625323 is a `hidden beast` number, since 2 + 17 + 6 + 8 + 625 + 3 + 2 + 3 = 666.

It is not a de Polignac number, because 21768625323 - 2¹⁰ = 21768624299 is a prime.

It is a super-3 number, since 3×21768625323³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21768625423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6075436 + ... + 6079017.

Almost surely, 2^21768625323 is an apocalyptic number.

21768625323 is a deficient number, since it is larger than the sum of its proper divisors (9832955077).

21768625323 is a wasteful number, since it uses less digits than its factorization.

21768625323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12154658 (or 12154655 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 21768625323 in words is "twenty-one billion, seven hundred sixty-eight million, six hundred twenty-five thousand, three hundred twenty-three".