21340626023 has 2 divisors, whose sum is σ = 21340626024. Its totient is φ = 21340626022.

The previous prime is 21340626001. The next prime is 21340626037. The reversal of 21340626023 is 32062604312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21340626023 - 2¹² = 21340621927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21340626323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10670313011 + 10670313012.

It is an arithmetic number, because the mean of its divisors is an integer number (10670313012).

Almost surely, 2^21340626023 is an apocalyptic number.

21340626023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21340626023 is an equidigital number, since it uses as much as digits as its factorization.

21340626023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The spelling of 21340626023 in words is "twenty-one billion, three hundred forty million, six hundred twenty-six thousand, twenty-three".