21162404519 has 2 divisors, whose sum is σ = 21162404520. Its totient is φ = 21162404518.

The previous prime is 21162404477. The next prime is 21162404533. The reversal of 21162404519 is 91540426112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21162404519 is a prime.

It is a super-2 number, since 2×21162404519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21162404579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10581202259 + 10581202260.

It is an arithmetic number, because the mean of its divisors is an integer number (10581202260).

Almost surely, 2^21162404519 is an apocalyptic number.

21162404519 is a deficient number, since it is larger than the sum of its proper divisors (1).

21162404519 is an equidigital number, since it uses as much as digits as its factorization.

21162404519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 21162404519 in words is "twenty-one billion, one hundred sixty-two million, four hundred four thousand, five hundred nineteen".