22020740 has 24 divisors (see below), whose sum is σ = 52850112. Its totient is φ = 7549920.

The previous prime is 22020709. The next prime is 22020749. The reversal of 22020740 is 4702022.

It is not an unprimeable number, because it can be changed into a prime (22020749) 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, 78506 + ... + 78785.

It is an arithmetic number, because the mean of its divisors is an integer number (2202088).

Almost surely, 2^22020740 is an apocalyptic number.

22020740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22020740 is an abundant number, since it is smaller than the sum of its proper divisors (30829372).

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

22020740 is a wasteful number, since it uses less digits than its factorization.

22020740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157307 (or 157305 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 22020740 is about 4692.6261304306. The cubic root of 22020740 is about 280.2919573736.

Adding to 22020740 its reverse (4702022), we get a palindrome (26722762).

The spelling of 22020740 in words is "twenty-two million, twenty thousand, seven hundred forty".