22064820 has 96 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 5512320.

The previous prime is 22064813. The next prime is 22064849. The reversal of 22064820 is 2846022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81285 + ... + 81555.

It is an arithmetic number, because the mean of its divisors is an integer number (685440).

Almost surely, 2^22064820 is an apocalyptic number.

22064820 is a gapful number since it is divisible by the number (20) 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 22064820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32901120).

22064820 is an abundant number, since it is smaller than the sum of its proper divisors (43737420).

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

22064820 is a wasteful number, since it uses less digits than its factorization.

22064820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 22064820 is about 4697.3205128030. The cubic root of 22064820 is about 280.4788574594.

The spelling of 22064820 in words is "twenty-two million, sixty-four thousand, eight hundred twenty".