22621956 has 48 divisors (see below), whose sum is σ = 61737984. Its totient is φ = 6312096.

The previous prime is 22621939. The next prime is 22621961. The reversal of 22621956 is 65912622.

It is a congruent number.

It is an unprimeable number.

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, 481 + ... + 6743.

It is an arithmetic number, because the mean of its divisors is an integer number (1286208).

Almost surely, 2^22621956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22621956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30868992).

22621956 is an abundant number, since it is smaller than the sum of its proper divisors (39116028).

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

22621956 is a wasteful number, since it uses less digits than its factorization.

22621956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6320 (or 6318 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 22621956 is about 4756.2544086708. The cubic root of 22621956 is about 282.8199564856.

The spelling of 22621956 in words is "twenty-two million, six hundred twenty-one thousand, nine hundred fifty-six".