22031420 has 12 divisors (see below), whose sum is σ = 46266024. Its totient is φ = 8812560.

The previous prime is 22031419. The next prime is 22031423. The reversal of 22031420 is 2413022.

It is a junction number, because it is equal to n+sod(n) for n = 22031395 and 22031404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550766 + ... + 550805.

It is an arithmetic number, because the mean of its divisors is an integer number (3855502).

Almost surely, 2^22031420 is an apocalyptic number.

22031420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22031420 is an abundant number, since it is smaller than the sum of its proper divisors (24234604).

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

22031420 is a wasteful number, since it uses less digits than its factorization.

22031420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101580 (or 1101578 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22031420 is about 4693.7639480485. The cubic root of 22031420 is about 280.3372636664.

Adding to 22031420 its reverse (2413022), we get a palindrome (24444442).

The spelling of 22031420 in words is "twenty-two million, thirty-one thousand, four hundred twenty".