20228454 has 80 divisors (see below), whose sum is σ = 48612960. Its totient is φ = 6272640.

The previous prime is 20228449. The next prime is 20228489. The reversal of 20228454 is 45482202.

It is a happy number.

20228454 is a `hidden beast` number, since 202 + 2 + 8 + 454 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 227242 + ... + 227330.

It is an arithmetic number, because the mean of its divisors is an integer number (607662).

Almost surely, 2^20228454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20228454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24306480).

20228454 is an abundant number, since it is smaller than the sum of its proper divisors (28384506).

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

20228454 is a wasteful number, since it uses less digits than its factorization.

20228454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 20228454 is about 4497.6053628570. The cubic root of 20228454 is about 272.4713838031.

The spelling of 20228454 in words is "twenty million, two hundred twenty-eight thousand, four hundred fifty-four".