20190258 has 48 divisors (see below), whose sum is σ = 48218976. Its totient is φ = 6054720.

The previous prime is 20190241. The next prime is 20190277. The reversal of 20190258 is 85209102.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20710 + ... + 21662.

It is an arithmetic number, because the mean of its divisors is an integer number (1004562).

Almost surely, 2^20190258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20190258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24109488).

20190258 is an abundant number, since it is smaller than the sum of its proper divisors (28028718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20190258 is a wasteful number, since it uses less digits than its factorization.

20190258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20190258 is about 4493.3570968709. The cubic root of 20190258 is about 272.2997794163.

The spelling of 20190258 in words is "twenty million, one hundred ninety thousand, two hundred fifty-eight".