21976134395 has 8 divisors (see below), whose sum is σ = 26375156304. Its totient is φ = 17578377504.

The previous prime is 21976134377. The next prime is 21976134419. The reversal of 21976134395 is 59343167912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21976134395 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277604 + ... + 347873.

It is an arithmetic number, because the mean of its divisors is an integer number (3296894538).

Almost surely, 2^21976134395 is an apocalyptic number.

21976134395 is a deficient number, since it is larger than the sum of its proper divisors (4399021909).

21976134395 is an equidigital number, since it uses as much as digits as its factorization.

21976134395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632509.

The product of its digits is 1224720, while the sum is 50.

The spelling of 21976134395 in words is "twenty-one billion, nine hundred seventy-six million, one hundred thirty-four thousand, three hundred ninety-five".