22203864 has 48 divisors (see below), whose sum is σ = 60601320. Its totient is φ = 7344000.

The previous prime is 22203847. The next prime is 22203869. The reversal of 22203864 is 46830222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22203869) 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 11 ways as a sum of consecutive naturals, for example, 8739 + ... + 10989.

Almost surely, 2^22203864 is an apocalyptic number.

22203864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22203864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30300660).

22203864 is an abundant number, since it is smaller than the sum of its proper divisors (38397456).

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

22203864 is a wasteful number, since it uses less digits than its factorization.

22203864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 22203864 is about 4712.0976220787. The cubic root of 22203864 is about 281.0667808167.

It can be divided in two parts, 2220 and 3864, that added together give a square (6084 = 78²).

The spelling of 22203864 in words is "twenty-two million, two hundred three thousand, eight hundred sixty-four".