20365140 has 48 divisors (see below), whose sum is σ = 58867200. Its totient is φ = 5255040.

The previous prime is 20365139. The next prime is 20365141. The reversal of 20365140 is 4156302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20365139) and next prime (20365141).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20365141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3615 + ... + 7334.

It is an arithmetic number, because the mean of its divisors is an integer number (1226400).

Almost surely, 2^20365140 is an apocalyptic number.

20365140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20365140 is an abundant number, since it is smaller than the sum of its proper divisors (38502060).

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

20365140 is a wasteful number, since it uses less digits than its factorization.

20365140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10992 (or 10990 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20365140 is about 4512.7751993646. The cubic root of 20365140 is about 273.0837135428.

The spelling of 20365140 in words is "twenty million, three hundred sixty-five thousand, one hundred forty".