22455820 has 24 divisors (see below), whose sum is σ = 49208544. Its totient is φ = 8591616.

The previous prime is 22455799. The next prime is 22455821. The reversal of 22455820 is 2855422.

It is not an unprimeable number, because it can be changed into a prime (22455821) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23949 + ... + 24868.

It is an arithmetic number, because the mean of its divisors is an integer number (2050356).

Almost surely, 2^22455820 is an apocalyptic number.

22455820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22455820 is an abundant number, since it is smaller than the sum of its proper divisors (26752724).

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

22455820 is a wasteful number, since it uses less digits than its factorization.

22455820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48849 (or 48847 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 22455820 is about 4738.7572210444. The cubic root of 22455820 is about 282.1259099396.

The spelling of 22455820 in words is "twenty-two million, four hundred fifty-five thousand, eight hundred twenty".