21829100 has 36 divisors (see below), whose sum is σ = 49866600. Its totient is φ = 8271360.

The previous prime is 21829091. The next prime is 21829121. The reversal of 21829100 is 192812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3845 + ... + 7644.

Almost surely, 2^21829100 is an apocalyptic number.

21829100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21829100 is an abundant number, since it is smaller than the sum of its proper divisors (28037500).

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

21829100 is a wasteful number, since it uses less digits than its factorization.

21829100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11522 (or 11515 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 21829100 is about 4672.1622403337. The cubic root of 21829100 is about 279.4764877927.

The spelling of 21829100 in words is "twenty-one million, eight hundred twenty-nine thousand, one hundred".