21650656413703 has 4 divisors (see below), whose sum is σ = 21650959668888. Its totient is φ = 21650353158520.

The previous prime is 21650656413667. The next prime is 21650656413721. The reversal of 21650656413703 is 30731465605612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21650656413703 - 2¹⁷ = 21650656282631 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21650656413733) 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, 151520476 + ... + 151663297.

It is an arithmetic number, because the mean of its divisors is an integer number (5412739917222).

Almost surely, 2^{21650656413703} is an apocalyptic number.

21650656413703 is a deficient number, since it is larger than the sum of its proper divisors (303255185).

21650656413703 is an equidigital number, since it uses as much as digits as its factorization.

21650656413703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303255184.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 21650656413703 in words is "twenty-one trillion, six hundred fifty billion, six hundred fifty-six million, four hundred thirteen thousand, seven hundred three".