21829803 has 8 divisors (see below), whose sum is σ = 30638400. Its totient is φ = 13787208.

The previous prime is 21829793. The next prime is 21829817. The reversal of 21829803 is 30892812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21829803 - 2¹² = 21825707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21828803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191433 + ... + 191546.

It is an arithmetic number, because the mean of its divisors is an integer number (3829800).

Almost surely, 2^21829803 is an apocalyptic number.

21829803 is a deficient number, since it is larger than the sum of its proper divisors (8808597).

21829803 is a wasteful number, since it uses less digits than its factorization.

21829803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383001.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 21829803 is about 4672.2374725607. The cubic root of 21829803 is about 279.4794879143.

The spelling of 21829803 in words is "twenty-one million, eight hundred twenty-nine thousand, eight hundred three".