20558254 has 4 divisors (see below), whose sum is σ = 30837384. Its totient is φ = 10279126.

The previous prime is 20558243. The next prime is 20558267. The reversal of 20558254 is 45285502.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5139562 + ... + 5139565.

It is an arithmetic number, because the mean of its divisors is an integer number (7709346).

Almost surely, 2^20558254 is an apocalyptic number.

20558254 is a deficient number, since it is larger than the sum of its proper divisors (10279130).

20558254 is a wasteful number, since it uses less digits than its factorization.

20558254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10279129.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 20558254 is about 4534.1210835177. The cubic root of 20558254 is about 273.9441785160.

The spelling of 20558254 in words is "twenty million, five hundred fifty-eight thousand, two hundred fifty-four".