21762419551 has 2 divisors, whose sum is σ = 21762419552. Its totient is φ = 21762419550.

The previous prime is 21762419533. The next prime is 21762419579. The reversal of 21762419551 is 15591426712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21762419551 - 2¹⁷ = 21762288479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21762419498 and 21762419507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21762416551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10881209775 + 10881209776.

It is an arithmetic number, because the mean of its divisors is an integer number (10881209776).

Almost surely, 2^21762419551 is an apocalyptic number.

21762419551 is a deficient number, since it is larger than the sum of its proper divisors (1).

21762419551 is an equidigital number, since it uses as much as digits as its factorization.

21762419551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The spelling of 21762419551 in words is "twenty-one billion, seven hundred sixty-two million, four hundred nineteen thousand, five hundred fifty-one".