22140020 has 24 divisors (see below), whose sum is σ = 53136384. Its totient is φ = 7590816.

The previous prime is 22139993. The next prime is 22140029. The reversal of 22140020 is 2004122.

It is a junction number, because it is equal to n+sod(n) for n = 22139983 and 22140010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22140029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78932 + ... + 79211.

It is an arithmetic number, because the mean of its divisors is an integer number (2214016).

Almost surely, 2^22140020 is an apocalyptic number.

22140020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22140020 is an abundant number, since it is smaller than the sum of its proper divisors (30996364).

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

22140020 is a wasteful number, since it uses less digits than its factorization.

22140020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158159 (or 158157 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22140020 is about 4705.3182676627. The cubic root of 22140020 is about 280.7971332462.

Adding to 22140020 its reverse (2004122), we get a palindrome (24144142).

The spelling of 22140020 in words is "twenty-two million, one hundred forty thousand, twenty".