21464166023 has 2 divisors, whose sum is σ = 21464166024. Its totient is φ = 21464166022.

The previous prime is 21464166019. The next prime is 21464166037. The reversal of 21464166023 is 32066146412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21464166023 - 2² = 21464166019 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21464166523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10732083011 + 10732083012.

It is an arithmetic number, because the mean of its divisors is an integer number (10732083012).

Almost surely, 2^21464166023 is an apocalyptic number.

21464166023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21464166023 is an equidigital number, since it uses as much as digits as its factorization.

21464166023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 21464166023 in words is "twenty-one billion, four hundred sixty-four million, one hundred sixty-six thousand, twenty-three".