20258121 has 16 divisors (see below), whose sum is σ = 29211840. Its totient is φ = 12413760.

The previous prime is 20258113. The next prime is 20258131. The reversal of 20258121 is 12185202.

It is a happy number.

It is not a de Polignac number, because 20258121 - 2³ = 20258113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20258111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9526 + ... + 11456.

It is an arithmetic number, because the mean of its divisors is an integer number (1825740).

Almost surely, 2^20258121 is an apocalyptic number.

It is an amenable number.

20258121 is a deficient number, since it is larger than the sum of its proper divisors (8953719).

20258121 is a wasteful number, since it uses less digits than its factorization.

20258121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 20258121 is about 4500.9022428842. The cubic root of 20258121 is about 272.6045206880.

The spelling of 20258121 in words is "twenty million, two hundred fifty-eight thousand, one hundred twenty-one".