22420356 has 24 divisors (see below), whose sum is σ = 59787840. Its totient is φ = 6405792.

The previous prime is 22420339. The next prime is 22420357. The reversal of 22420356 is 65302422.

It is not an unprimeable number, because it can be changed into a prime (22420357) 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, 133371 + ... + 133538.

It is an arithmetic number, because the mean of its divisors is an integer number (2491160).

Almost surely, 2^22420356 is an apocalyptic number.

It is an amenable number.

22420356 is an abundant number, since it is smaller than the sum of its proper divisors (37367484).

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

22420356 is a wasteful number, since it uses less digits than its factorization.

22420356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266923 (or 266921 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 22420356 is about 4735.0138331371. The cubic root of 22420356 is about 281.9773131993.

Adding to 22420356 its reverse (65302422), we get a palindrome (87722778).

The spelling of 22420356 in words is "twenty-two million, four hundred twenty thousand, three hundred fifty-six".