20229100 has 18 divisors (see below), whose sum is σ = 43897364. Its totient is φ = 8091600.

The previous prime is 20229089. The next prime is 20229101. The reversal of 20229100 is 192202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20229101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101046 + ... + 101245.

Almost surely, 2^20229100 is an apocalyptic number.

20229100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20229100 is an abundant number, since it is smaller than the sum of its proper divisors (23668264).

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

20229100 is a wasteful number, since it uses less digits than its factorization.

20229100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202305 (or 202298 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20229100 is about 4497.6771782777. The cubic root of 20229100 is about 272.4742842495.

The spelling of 20229100 in words is "twenty million, two hundred twenty-nine thousand, one hundred".