22427420 has 24 divisors (see below), whose sum is σ = 49868784. Its totient is φ = 8443136.

The previous prime is 22427417. The next prime is 22427423. The reversal of 22427420 is 2472422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22427417) and next prime (22427423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22427423) by changing a digit.

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, 32642 + ... + 33321.

It is an arithmetic number, because the mean of its divisors is an integer number (2077866).

Almost surely, 2^22427420 is an apocalyptic number.

22427420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22427420 is an abundant number, since it is smaller than the sum of its proper divisors (27441364).

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

22427420 is a wasteful number, since it uses less digits than its factorization.

22427420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65989 (or 65987 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 22427420 is about 4735.7597067419. The cubic root of 22427420 is about 282.0069243643.

Adding to 22427420 its reverse (2472422), we get a palindrome (24899842).

The spelling of 22427420 in words is "twenty-two million, four hundred twenty-seven thousand, four hundred twenty".