21023306837707 has 2 divisors, whose sum is σ = 21023306837708. Its totient is φ = 21023306837706.

The previous prime is 21023306837699. The next prime is 21023306837807. The reversal of 21023306837707 is 70773860332012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21023306837707 - 2³ = 21023306837699 is a prime.

It is not a weakly prime, because it can be changed into another prime (21023306837807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511653418853 + 10511653418854.

It is an arithmetic number, because the mean of its divisors is an integer number (10511653418854).

Almost surely, 2^{21023306837707} is an apocalyptic number.

21023306837707 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023306837707 is an equidigital number, since it uses as much as digits as its factorization.

21023306837707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1778112, while the sum is 49.

The spelling of 21023306837707 in words is "twenty-one trillion, twenty-three billion, three hundred six million, eight hundred thirty-seven thousand, seven hundred seven".