20228460 has 48 divisors (see below), whose sum is σ = 64732416. Its totient is φ = 4623552.

The previous prime is 20228449. The next prime is 20228489. The reversal of 20228460 is 6482202.

It is a self number, because there is not a number n which added to its sum of digits gives 20228460.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23662 + ... + 24501.

It is an arithmetic number, because the mean of its divisors is an integer number (1348592).

Almost surely, 2^20228460 is an apocalyptic number.

20228460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20228460 is an abundant number, since it is smaller than the sum of its proper divisors (44503956).

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

20228460 is a wasteful number, since it uses less digits than its factorization.

20228460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48182 (or 48180 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20228460 is about 4497.6060298786. The cubic root of 20228460 is about 272.4714107425.

The spelling of 20228460 in words is "twenty million, two hundred twenty-eight thousand, four hundred sixty".