21402143519 has 2 divisors, whose sum is σ = 21402143520. Its totient is φ = 21402143518.

The previous prime is 21402143513. The next prime is 21402143527. The reversal of 21402143519 is 91534120412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21402143519 is a prime.

It is a super-2 number, since 2×21402143519² (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 (21402143513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701071759 + 10701071760.

It is an arithmetic number, because the mean of its divisors is an integer number (10701071760).

Almost surely, 2^21402143519 is an apocalyptic number.

21402143519 is a deficient number, since it is larger than the sum of its proper divisors (1).

21402143519 is an equidigital number, since it uses as much as digits as its factorization.

21402143519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 21402143519 in words is "twenty-one billion, four hundred two million, one hundred forty-three thousand, five hundred nineteen".