22146140 has 24 divisors (see below), whose sum is σ = 48111840. Its totient is φ = 8552768.

The previous prime is 22146139. The next prime is 22146151. The reversal of 22146140 is 4164122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 18512 + ... + 19671.

It is an arithmetic number, because the mean of its divisors is an integer number (2004660).

Almost surely, 2^22146140 is an apocalyptic number.

22146140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22146140 is an abundant number, since it is smaller than the sum of its proper divisors (25965700).

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

22146140 is a wasteful number, since it uses less digits than its factorization.

22146140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38221 (or 38219 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 22146140 is about 4705.9685506811. The cubic root of 22146140 is about 280.8230037458.

The spelling of 22146140 in words is "twenty-two million, one hundred forty-six thousand, one hundred forty".