22070820 has 48 divisors (see below), whose sum is σ = 62657280. Its totient is φ = 5803776.

The previous prime is 22070819. The next prime is 22070831. The reversal of 22070820 is 2807022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1861 + ... + 6899.

It is an arithmetic number, because the mean of its divisors is an integer number (1305360).

Almost surely, 2^22070820 is an apocalyptic number.

22070820 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 22070820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31328640).

22070820 is an abundant number, since it is smaller than the sum of its proper divisors (40586460).

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

22070820 is a wasteful number, since it uses less digits than its factorization.

22070820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5124 (or 5122 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 22070820 is about 4697.9591313676. The cubic root of 22070820 is about 280.5042783274.

Adding to 22070820 its reverse (2807022), we get a palindrome (24877842).

The spelling of 22070820 in words is "twenty-two million, seventy thousand, eight hundred twenty".