21940301 has 4 divisors (see below), whose sum is σ = 22038912. Its totient is φ = 21841692.

The previous prime is 21940291. The next prime is 21940309. The reversal of 21940301 is 10304912.

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 21940301 - 2¹⁰ = 21939277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21940309) 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, 48971 + ... + 49416.

It is an arithmetic number, because the mean of its divisors is an integer number (5509728).

Almost surely, 2^21940301 is an apocalyptic number.

It is an amenable number.

21940301 is a deficient number, since it is larger than the sum of its proper divisors (98611).

21940301 is an equidigital number, since it uses as much as digits as its factorization.

21940301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98610.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 21940301 is about 4684.0475018941. The cubic root of 21940301 is about 279.9502505149.

The spelling of 21940301 in words is "twenty-one million, nine hundred forty thousand, three hundred one".