22720667 has 4 divisors (see below), whose sum is σ = 22941360. Its totient is φ = 22499976.

The previous prime is 22720631. The next prime is 22720673. The reversal of 22720667 is 76602722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22720667 - 2²² = 18526363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22720267) by changing a digit.

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, 110192 + ... + 110397.

It is an arithmetic number, because the mean of its divisors is an integer number (5735340).

Almost surely, 2^22720667 is an apocalyptic number.

22720667 is a deficient number, since it is larger than the sum of its proper divisors (220693).

22720667 is a wasteful number, since it uses less digits than its factorization.

22720667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220692.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 22720667 is about 4766.6200813574. The cubic root of 22720667 is about 283.2307216278.

The spelling of 22720667 in words is "twenty-two million, seven hundred twenty thousand, six hundred sixty-seven".