21976922 has 8 divisors (see below), whose sum is σ = 35962272. Its totient is φ = 9989500.

The previous prime is 21976921. The next prime is 21976957. The reversal of 21976922 is 22967912.

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 (21976921) 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, 499454 + ... + 499497.

It is an arithmetic number, because the mean of its divisors is an integer number (4495284).

Almost surely, 2^21976922 is an apocalyptic number.

21976922 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21976922 is a deficient number, since it is larger than the sum of its proper divisors (13985350).

21976922 is a wasteful number, since it uses less digits than its factorization.

21976922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998964.

The product of its digits is 27216, while the sum is 38.

The square root of 21976922 is about 4687.9549912515. The cubic root of 21976922 is about 280.1059208107.

It can be divided in two parts, 2197 and 6922, that added together give a palindrome (9119).

The spelling of 21976922 in words is "twenty-one million, nine hundred seventy-six thousand, nine hundred twenty-two".