20228700 has 36 divisors (see below), whose sum is σ = 58529240. Its totient is φ = 5394240.

The previous prime is 20228699. The next prime is 20228701. The reversal of 20228700 is 782202.

It is an interprime number because it is at equal distance from previous prime (20228699) and next prime (20228701).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33415 + ... + 34014.

Almost surely, 2^20228700 is an apocalyptic number.

20228700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20228700 is an abundant number, since it is smaller than the sum of its proper divisors (38300540).

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

20228700 is a wasteful number, since it uses less digits than its factorization.

20228700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67446 (or 67439 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 20228700 is about 4497.6327106601. The cubic root of 20228700 is about 272.4724883147.

The spelling of 20228700 in words is "twenty million, two hundred twenty-eight thousand, seven hundred".