20212458 has 16 divisors (see below), whose sum is σ = 46200000. Its totient is φ = 5774976.

The previous prime is 20212457. The next prime is 20212463. The reversal of 20212458 is 85421202.

It is not an unprimeable number, because it can be changed into a prime (20212453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240583 + ... + 240666.

It is an arithmetic number, because the mean of its divisors is an integer number (2887500).

Almost surely, 2^20212458 is an apocalyptic number.

20212458 is an abundant number, since it is smaller than the sum of its proper divisors (25987542).

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

20212458 is a wasteful number, since it uses less digits than its factorization.

20212458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481261.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20212458 is about 4495.8267315367. The cubic root of 20212458 is about 272.3995443766.

The spelling of 20212458 in words is "twenty million, two hundred twelve thousand, four hundred fifty-eight".