22355020 has 48 divisors (see below), whose sum is σ = 50047200. Its totient is φ = 8363520.

The previous prime is 22354987. The next prime is 22355023. The reversal of 22355020 is 2055322.

22355020 = T₁₃₅ + T₁₃₆ + ... + T₅₁₄.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (22355023) 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 15 ways as a sum of consecutive naturals, for example, 33490 + ... + 34150.

It is an arithmetic number, because the mean of its divisors is an integer number (1042650).

Almost surely, 2^22355020 is an apocalyptic number.

22355020 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 22355020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25023600).

22355020 is an abundant number, since it is smaller than the sum of its proper divisors (27692180).

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

22355020 is a wasteful number, since it uses less digits than its factorization.

22355020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 22355020 is about 4728.1095587983. The cubic root of 22355020 is about 281.7031398135.

The spelling of 22355020 in words is "twenty-two million, three hundred fifty-five thousand, twenty".