21092301 has 6 divisors (see below), whose sum is σ = 30466670. Its totient is φ = 14061528.

The previous prime is 21092297. The next prime is 21092339. The reversal of 21092301 is 10329012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13883076 + 7209225 = 3726^2 + 2685^2 .

It is not a de Polignac number, because 21092301 - 2² = 21092297 is a prime.

It is a super-2 number, since 2×21092301² = 889770322949202, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

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 (21092341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1171786 + ... + 1171803.

Almost surely, 2^21092301 is an apocalyptic number.

It is an amenable number.

21092301 is a deficient number, since it is larger than the sum of its proper divisors (9374369).

21092301 is a wasteful number, since it uses less digits than its factorization.

21092301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343595 (or 2343592 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 21092301 is about 4592.6355178699. The cubic root of 21092301 is about 276.2960355431.

The spelling of 21092301 in words is "twenty-one million, ninety-two thousand, three hundred one".