21976834 has 8 divisors (see below), whose sum is σ = 35962128. Its totient is φ = 9989460.

The previous prime is 21976831. The next prime is 21976847. The reversal of 21976834 is 43867912.

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

It is not an unprimeable number, because it can be changed into a prime (21976831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499452 + ... + 499495.

It is an arithmetic number, because the mean of its divisors is an integer number (4495266).

Almost surely, 2^21976834 is an apocalyptic number.

21976834 is a deficient number, since it is larger than the sum of its proper divisors (13985294).

21976834 is a wasteful number, since it uses less digits than its factorization.

21976834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998960.

The product of its digits is 72576, while the sum is 40.

The square root of 21976834 is about 4687.9456054865. The cubic root of 21976834 is about 280.1055469434.

It can be divided in two parts, 2 and 1976834, that added together give a square (1976836 = 1406²).

The spelling of 21976834 in words is "twenty-one million, nine hundred seventy-six thousand, eight hundred thirty-four".