20212258 has 16 divisors (see below), whose sum is σ = 33153120. Its totient is φ = 9165600.

The previous prime is 20212223. The next prime is 20212259. The reversal of 20212258 is 85221202.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20212259) 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, 11758 + ... + 13366.

It is an arithmetic number, because the mean of its divisors is an integer number (2072070).

Almost surely, 2^20212258 is an apocalyptic number.

20212258 is a deficient number, since it is larger than the sum of its proper divisors (12940862).

20212258 is a wasteful number, since it uses less digits than its factorization.

20212258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20212258 is about 4495.8044886316. The cubic root of 20212258 is about 272.3986459194.

The spelling of 20212258 in words is "twenty million, two hundred twelve thousand, two hundred fifty-eight".