21769196 has 12 divisors (see below), whose sum is σ = 39025560. Its totient is φ = 10619040.

The previous prime is 21769183. The next prime is 21769211. The reversal of 21769196 is 69196712.

It is a Harshad number since it is a multiple of its sum of digits (41).

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 3 ways as a sum of consecutive naturals, for example, 66206 + ... + 66533.

It is an arithmetic number, because the mean of its divisors is an integer number (3252130).

Almost surely, 2^21769196 is an apocalyptic number.

It is an amenable number.

21769196 is a deficient number, since it is larger than the sum of its proper divisors (17256364).

21769196 is a wasteful number, since it uses less digits than its factorization.

21769196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132784 (or 132782 counting only the distinct ones).

The product of its digits is 40824, while the sum is 41.

The square root of 21769196 is about 4665.7470998759. The cubic root of 21769196 is about 279.2206046320.

The spelling of 21769196 in words is "twenty-one million, seven hundred sixty-nine thousand, one hundred ninety-six".