21829802 has 16 divisors (see below), whose sum is σ = 35163072. Its totient is φ = 10127040.

The previous prime is 21829793. The next prime is 21829817. The reversal of 21829802 is 20892812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2108 + ... + 6935.

It is an arithmetic number, because the mean of its divisors is an integer number (2197692).

Almost surely, 2^21829802 is an apocalyptic number.

21829802 is a deficient number, since it is larger than the sum of its proper divisors (13333270).

21829802 is a wasteful number, since it uses less digits than its factorization.

21829802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9133.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 21829802 is about 4672.2373655455. The cubic root of 21829802 is about 279.4794836468.

The spelling of 21829802 in words is "twenty-one million, eight hundred twenty-nine thousand, eight hundred two".