20372075 has 6 divisors (see below), whose sum is σ = 25261404. Its totient is φ = 16297640.

The previous prime is 20372071. The next prime is 20372083. The reversal of 20372075 is 57027302.

It is not a de Polignac number, because 20372075 - 2² = 20372071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20372071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 407417 + ... + 407466.

It is an arithmetic number, because the mean of its divisors is an integer number (4210234).

Almost surely, 2^20372075 is an apocalyptic number.

20372075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20372075 is a deficient number, since it is larger than the sum of its proper divisors (4889329).

20372075 is an equidigital number, since it uses as much as digits as its factorization.

20372075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814893 (or 814888 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 20372075 is about 4513.5435081541. The cubic root of 20372075 is about 273.1147080204.

Adding to 20372075 its reverse (57027302), we get a palindrome (77399377).

The spelling of 20372075 in words is "twenty million, three hundred seventy-two thousand, seventy-five".