21344016701 has 4 divisors (see below), whose sum is σ = 24393161952. Its totient is φ = 18294871452.

The previous prime is 21344016679. The next prime is 21344016713. The reversal of 21344016701 is 10761044312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21344016701 - 2¹⁰ = 21344015677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344016731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1524572615 + ... + 1524572628.

It is an arithmetic number, because the mean of its divisors is an integer number (6098290488).

Almost surely, 2^21344016701 is an apocalyptic number.

It is an amenable number.

21344016701 is a deficient number, since it is larger than the sum of its proper divisors (3049145251).

21344016701 is an equidigital number, since it uses as much as digits as its factorization.

21344016701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049145250.

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 21344016701 in words is "twenty-one billion, three hundred forty-four million, sixteen thousand, seven hundred one".