20428854 has 16 divisors (see below), whose sum is σ = 40906992. Its totient is φ = 6801408.

The previous prime is 20428843. The next prime is 20428909. The reversal of 20428854 is 45882402.

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, 5442 + ... + 8394.

It is an arithmetic number, because the mean of its divisors is an integer number (2556687).

Almost surely, 2^20428854 is an apocalyptic number.

20428854 is an abundant number, since it is smaller than the sum of its proper divisors (20478138).

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

20428854 is a wasteful number, since it uses less digits than its factorization.

20428854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111.

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 20428854 is about 4519.8289790655. The cubic root of 20428854 is about 273.3682052805.

The spelling of 20428854 in words is "twenty million, four hundred twenty-eight thousand, eight hundred fifty-four".