20220740 has 12 divisors (see below), whose sum is σ = 42463596. Its totient is φ = 8088288.

The previous prime is 20220713. The next prime is 20220751. The reversal of 20220740 is 4702202.

It can be written as a sum of positive squares in 2 ways, for example, as 6927424 + 13293316 = 2632^2 + 3646^2 .

It is a super-2 number, since 2×20220740² = 817756652295200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505499 + ... + 505538.

It is an arithmetic number, because the mean of its divisors is an integer number (3538633).

Almost surely, 2^20220740 is an apocalyptic number.

20220740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20220740 is an abundant number, since it is smaller than the sum of its proper divisors (22242856).

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

20220740 is a wasteful number, since it uses less digits than its factorization.

20220740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011046 (or 1011044 counting only the distinct ones).

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

The square root of 20220740 is about 4496.7477136259. The cubic root of 20220740 is about 272.4367442884.

Adding to 20220740 its reverse (4702202), we get a palindrome (24922942).

The spelling of 20220740 in words is "twenty million, two hundred twenty thousand, seven hundred forty".