22047636 has 48 divisors (see below), whose sum is σ = 56134400. Its totient is φ = 6694272.

The previous prime is 22047631. The next prime is 22047637. The reversal of 22047636 is 63674022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22047631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11430 + ... + 13218.

Almost surely, 2^22047636 is an apocalyptic number.

22047636 is a gapful number since it is divisible by the number (26) 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 22047636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28067200).

22047636 is an abundant number, since it is smaller than the sum of its proper divisors (34086764).

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

22047636 is a wasteful number, since it uses less digits than its factorization.

22047636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888 (or 1886 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 22047636 is about 4695.4910286359. The cubic root of 22047636 is about 280.4060265846.

The spelling of 22047636 in words is "twenty-two million, forty-seven thousand, six hundred thirty-six".