21925066 has 8 divisors (see below), whose sum is σ = 32907744. Its totient is φ = 10955820.

The previous prime is 21925021. The next prime is 21925097. The reversal of 21925066 is 66052912.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3651 + ... + 7561.

It is an arithmetic number, because the mean of its divisors is an integer number (4113468).

Almost surely, 2^21925066 is an apocalyptic number.

21925066 is a deficient number, since it is larger than the sum of its proper divisors (10982678).

21925066 is a wasteful number, since it uses less digits than its factorization.

21925066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6716.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 21925066 is about 4682.4209550189. The cubic root of 21925066 is about 279.8854378271.

Adding to 21925066 its reverse (66052912), we get a palindrome (87977978).

The spelling of 21925066 in words is "twenty-one million, nine hundred twenty-five thousand, sixty-six".