21862997963 has 2 divisors, whose sum is σ = 21862997964. Its totient is φ = 21862997962.

The previous prime is 21862997831. The next prime is 21862997971. The reversal of 21862997963 is 36979926812.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21862997963 - 2⁸ = 21862997707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21862997896 and 21862997905.

It is not a weakly prime, because it can be changed into another prime (21862991963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10931498981 + 10931498982.

It is an arithmetic number, because the mean of its divisors is an integer number (10931498982).

Almost surely, 2^21862997963 is an apocalyptic number.

21862997963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21862997963 is an equidigital number, since it uses as much as digits as its factorization.

21862997963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 62.

The spelling of 21862997963 in words is "twenty-one billion, eight hundred sixty-two million, nine hundred ninety-seven thousand, nine hundred sixty-three".