21677934759 has 8 divisors (see below), whose sum is σ = 31127290992. Its totient is φ = 13340267520.

The previous prime is 21677934701. The next prime is 21677934763. The reversal of 21677934759 is 95743977612.

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

It is not a de Polignac number, because 21677934759 - 2⁹ = 21677934247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21677934259) 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, 277922202 + ... + 277922279.

It is an arithmetic number, because the mean of its divisors is an integer number (3890911374).

Almost surely, 2^21677934759 is an apocalyptic number.

21677934759 is a deficient number, since it is larger than the sum of its proper divisors (9449356233).

21677934759 is a wasteful number, since it uses less digits than its factorization.

21677934759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555844497.

The product of its digits is 20003760, while the sum is 60.

The spelling of 21677934759 in words is "twenty-one billion, six hundred seventy-seven million, nine hundred thirty-four thousand, seven hundred fifty-nine".