22160820 has 48 divisors (see below), whose sum is σ = 67693248. Its totient is φ = 5372160.

The previous prime is 22160807. The next prime is 22160833. The reversal of 22160820 is 2806122.

It is an interprime number because it is at equal distance from previous prime (22160807) and next prime (22160833).

It is a super-2 number, since 2×22160820² = 982203886144800, which contains 22 as substring.

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, 16129 + ... + 17448.

It is an arithmetic number, because the mean of its divisors is an integer number (1410276).

Almost surely, 2^22160820 is an apocalyptic number.

22160820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22160820 is an abundant number, since it is smaller than the sum of its proper divisors (45532428).

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

22160820 is a wasteful number, since it uses less digits than its factorization.

22160820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33600 (or 33598 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 22160820 is about 4707.5280137244. The cubic root of 22160820 is about 280.8850397054.

Adding to 22160820 its reverse (2806122), we get a palindrome (24966942).

The spelling of 22160820 in words is "twenty-two million, one hundred sixty thousand, eight hundred twenty".