21642294083 has 2 divisors, whose sum is σ = 21642294084. Its totient is φ = 21642294082.

The previous prime is 21642294049. The next prime is 21642294097. The reversal of 21642294083 is 38049224612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21642294083 - 2²² = 21638099779 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21642294083.

It is not a weakly prime, because it can be changed into another prime (21642294043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10821147041 + 10821147042.

It is an arithmetic number, because the mean of its divisors is an integer number (10821147042).

Almost surely, 2^21642294083 is an apocalyptic number.

21642294083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21642294083 is an equidigital number, since it uses as much as digits as its factorization.

21642294083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 21642294083 in words is "twenty-one billion, six hundred forty-two million, two hundred ninety-four thousand, eighty-three".