20398254 has 16 divisors (see below), whose sum is σ = 41745792. Its totient is φ = 6641208.

The previous prime is 20398243. The next prime is 20398277. The reversal of 20398254 is 45289302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39274 + ... + 39789.

It is an arithmetic number, because the mean of its divisors is an integer number (2609112).

Almost surely, 2^20398254 is an apocalyptic number.

20398254 is an abundant number, since it is smaller than the sum of its proper divisors (21347538).

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

20398254 is a wasteful number, since it uses less digits than its factorization.

20398254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79111.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 20398254 is about 4516.4426266698. The cubic root of 20398254 is about 273.2316460265.

The spelling of 20398254 in words is "twenty million, three hundred ninety-eight thousand, two hundred fifty-four".