21796641059 has 4 divisors (see below), whose sum is σ = 22385739504. Its totient is φ = 21207542616.

The previous prime is 21796640977. The next prime is 21796641073. The reversal of 21796641059 is 95014669712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21796641059 - 2¹⁶ = 21796575523 is a prime.

It is a super-2 number, since 2×21796641059² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21796640998 and 21796641016.

It is not an unprimeable number, because it can be changed into a prime (21796646059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294549167 + ... + 294549240.

It is an arithmetic number, because the mean of its divisors is an integer number (5596434876).

Almost surely, 2^21796641059 is an apocalyptic number.

21796641059 is a deficient number, since it is larger than the sum of its proper divisors (589098445).

21796641059 is an equidigital number, since it uses as much as digits as its factorization.

21796641059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589098444.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 21796641059 in words is "twenty-one billion, seven hundred ninety-six million, six hundred forty-one thousand, fifty-nine".