21976842395 has 16 divisors (see below), whose sum is σ = 27950712768. Its totient is φ = 16531153920.

The previous prime is 21976842373. The next prime is 21976842409. The reversal of 21976842395 is 59324867912.

It is not a de Polignac number, because 21976842395 - 2⁶ = 21976842331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21976842395.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37754 + ... + 213023.

It is an arithmetic number, because the mean of its divisors is an integer number (1746919548).

Almost surely, 2^21976842395 is an apocalyptic number.

21976842395 is a deficient number, since it is larger than the sum of its proper divisors (5973870373).

21976842395 is a wasteful number, since it uses less digits than its factorization.

21976842395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251830.

The product of its digits is 6531840, while the sum is 56.

The spelling of 21976842395 in words is "twenty-one billion, nine hundred seventy-six million, eight hundred forty-two thousand, three hundred ninety-five".