21469613723 has 2 divisors, whose sum is σ = 21469613724. Its totient is φ = 21469613722.

The previous prime is 21469613719. The next prime is 21469613801. The reversal of 21469613723 is 32731696412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21469613723 - 2² = 21469613719 is a prime.

It is not a weakly prime, because it can be changed into another prime (21469615723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10734806861 + 10734806862.

It is an arithmetic number, because the mean of its divisors is an integer number (10734806862).

Almost surely, 2^21469613723 is an apocalyptic number.

21469613723 is a deficient number, since it is larger than the sum of its proper divisors (1).

21469613723 is an equidigital number, since it uses as much as digits as its factorization.

21469613723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The spelling of 21469613723 in words is "twenty-one billion, four hundred sixty-nine million, six hundred thirteen thousand, seven hundred twenty-three".