20346228 has 60 divisors (see below), whose sum is σ = 60794272. Its totient is φ = 5812560.

The previous prime is 20346211. The next prime is 20346247. The reversal of 20346228 is 82264302.

20346228 is a `hidden beast` number, since 2 + 0 + 34 + 622 + 8 = 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 19 ways as a sum of consecutive naturals, for example, 2218 + ... + 6753.

Almost surely, 2^20346228 is an apocalyptic number.

20346228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20346228 is an abundant number, since it is smaller than the sum of its proper divisors (40448044).

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

20346228 is a wasteful number, since it uses less digits than its factorization.

20346228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8994 (or 8983 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20346228 is about 4510.6793279948. The cubic root of 20346228 is about 272.9991546888. Note that the first 3 decimals are identical.

The spelling of 20346228 in words is "twenty million, three hundred forty-six thousand, two hundred twenty-eight".