21762419579 has 2 divisors, whose sum is σ = 21762419580. Its totient is φ = 21762419578.

The previous prime is 21762419551. The next prime is 21762419587. The reversal of 21762419579 is 97591426712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21762419579 - 2⁸ = 21762419323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21762419579.

It is not a weakly prime, because it can be changed into another prime (21762419179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10881209789 + 10881209790.

It is an arithmetic number, because the mean of its divisors is an integer number (10881209790).

Almost surely, 2^21762419579 is an apocalyptic number.

21762419579 is a deficient number, since it is larger than the sum of its proper divisors (1).

21762419579 is an equidigital number, since it uses as much as digits as its factorization.

21762419579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The spelling of 21762419579 in words is "twenty-one billion, seven hundred sixty-two million, four hundred nineteen thousand, five hundred seventy-nine".