21966802 has 32 divisors (see below), whose sum is σ = 39191040. Its totient is φ = 9102720.

The previous prime is 21966787. The next prime is 21966803. The reversal of 21966802 is 20866912.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21966803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25023 + ... + 25885.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720).

Almost surely, 2^21966802 is an apocalyptic number.

21966802 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21966802 is a deficient number, since it is larger than the sum of its proper divisors (17224238).

21966802 is a wasteful number, since it uses less digits than its factorization.

21966802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 21966802 is about 4686.8755050673. The cubic root of 21966802 is about 280.0629195336.

It can be divided in two parts, 2196 and 6802, that added together give a palindrome (8998).

The spelling of 21966802 in words is "twenty-one million, nine hundred sixty-six thousand, eight hundred two".