20393255 has 4 divisors (see below), whose sum is σ = 24471912. Its totient is φ = 16314600.

The previous prime is 20393239. The next prime is 20393267. The reversal of 20393255 is 55239302.

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

It is not a de Polignac number, because 20393255 - 2⁴ = 20393239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2039321 + ... + 2039330.

It is an arithmetic number, because the mean of its divisors is an integer number (6117978).

Almost surely, 2^20393255 is an apocalyptic number.

20393255 is a deficient number, since it is larger than the sum of its proper divisors (4078657).

20393255 is an equidigital number, since it uses as much as digits as its factorization.

20393255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078656.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 20393255 is about 4515.8891704735. The cubic root of 20393255 is about 273.2093239102.

The spelling of 20393255 in words is "twenty million, three hundred ninety-three thousand, two hundred fifty-five".