22071864 has 32 divisors (see below), whose sum is σ = 55495440. Its totient is φ = 7315200.

The previous prime is 22071851. The next prime is 22071883. The reversal of 22071864 is 46817022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1804 + ... + 6884.

Almost surely, 2^22071864 is an apocalyptic number.

22071864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22071864 is an abundant number, since it is smaller than the sum of its proper divisors (33423576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22071864 is a wasteful number, since it uses less digits than its factorization.

22071864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271 (or 5267 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 22071864 is about 4698.0702421313. The cubic root of 22071864 is about 280.5087010878.

Adding to 22071864 its reverse (46817022), we get a palindrome (68888886).

The spelling of 22071864 in words is "twenty-two million, seventy-one thousand, eight hundred sixty-four".