22420687 has 4 divisors (see below), whose sum is σ = 22642776. Its totient is φ = 22198600.

The previous prime is 22420667. The next prime is 22420693. The reversal of 22420687 is 78602422.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22420687 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22420667) 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, 110893 + ... + 111094.

It is an arithmetic number, because the mean of its divisors is an integer number (5660694).

Almost surely, 2^22420687 is an apocalyptic number.

22420687 is a deficient number, since it is larger than the sum of its proper divisors (222089).

22420687 is a wasteful number, since it uses less digits than its factorization.

22420687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222088.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 22420687 is about 4735.0487853875. The cubic root of 22420687 is about 281.9787008376.

The spelling of 22420687 in words is "twenty-two million, four hundred twenty thousand, six hundred eighty-seven".