22207920 has 80 divisors (see below), whose sum is σ = 78685440. Its totient is φ = 5075712.

The previous prime is 22207919. The next prime is 22207973. The reversal of 22207920 is 2970222.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4930 + ... + 8289.

It is an arithmetic number, because the mean of its divisors is an integer number (983568).

Almost surely, 2^22207920 is an apocalyptic number.

22207920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22207920 is an abundant number, since it is smaller than the sum of its proper divisors (56477520).

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

22207920 is a wasteful number, since it uses less digits than its factorization.

22207920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13242 (or 13236 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 22207920 is about 4712.5279840018. The cubic root of 22207920 is about 281.0838940160.

The spelling of 22207920 in words is "twenty-two million, two hundred seven thousand, nine hundred twenty".