21451650301 has 4 divisors (see below), whose sum is σ = 21541406400. Its totient is φ = 21361894204.

The previous prime is 21451650299. The next prime is 21451650323. The reversal of 21451650301 is 10305615412.

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 21451650301 - 2¹ = 21451650299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21451650301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21451650601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44877691 + ... + 44878168.

It is an arithmetic number, because the mean of its divisors is an integer number (5385351600).

Almost surely, 2^21451650301 is an apocalyptic number.

It is an amenable number.

21451650301 is a deficient number, since it is larger than the sum of its proper divisors (89756099).

21451650301 is an equidigital number, since it uses as much as digits as its factorization.

21451650301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89756098.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 21451650301 in words is "twenty-one billion, four hundred fifty-one million, six hundred fifty thousand, three hundred one".