20223140 has 24 divisors (see below), whose sum is σ = 48535872. Its totient is φ = 6933600.

The previous prime is 20223139. The next prime is 20223167. The reversal of 20223140 is 4132202.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72086 + ... + 72365.

It is an arithmetic number, because the mean of its divisors is an integer number (2022328).

Almost surely, 2^20223140 is an apocalyptic number.

20223140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20223140 is an abundant number, since it is smaller than the sum of its proper divisors (28312732).

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

20223140 is a wasteful number, since it uses less digits than its factorization.

20223140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144467 (or 144465 counting only the distinct ones).

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

The square root of 20223140 is about 4497.0145652421. The cubic root of 20223140 is about 272.4475223694.

Adding to 20223140 its reverse (4132202), we get a palindrome (24355342).

The spelling of 20223140 in words is "twenty million, two hundred twenty-three thousand, one hundred forty".