20927243 has 4 divisors (see below), whose sum is σ = 20982840. Its totient is φ = 20871648.

The previous prime is 20927233. The next prime is 20927279. The reversal of 20927243 is 34272902.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20927243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20927233) 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, 27230 + ... + 27987.

It is an arithmetic number, because the mean of its divisors is an integer number (5245710).

Almost surely, 2^20927243 is an apocalyptic number.

20927243 is a deficient number, since it is larger than the sum of its proper divisors (55597).

20927243 is an equidigital number, since it uses as much as digits as its factorization.

20927243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55596.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20927243 is about 4574.6303675816. The cubic root of 20927243 is about 275.5734282533.

The spelling of 20927243 in words is "twenty million, nine hundred twenty-seven thousand, two hundred forty-three".