23270821 has 8 divisors (see below), whose sum is σ = 27244224. Its totient is φ = 19459680.

The previous prime is 23270809. The next prime is 23270827. The reversal of 23270821 is 12807232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23270821 - 2⁹ = 23270309 is a prime.

It is a super-2 number, since 2×23270821² = 1083062220028082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23270827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40255 + ... + 40828.

It is an arithmetic number, because the mean of its divisors is an integer number (3405528).

Almost surely, 2^23270821 is an apocalyptic number.

It is an amenable number.

23270821 is a deficient number, since it is larger than the sum of its proper divisors (3973403).

23270821 is an equidigital number, since it uses as much as digits as its factorization.

23270821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81131.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 23270821 is about 4823.9839344674. The cubic root of 23270821 is about 285.4985466989.

The spelling of 23270821 in words is "twenty-three million, two hundred seventy thousand, eight hundred twenty-one".