20272751 has 2 divisors, whose sum is σ = 20272752. Its totient is φ = 20272750.

The previous prime is 20272741. The next prime is 20272771. The reversal of 20272751 is 15727202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20272751 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20272751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20272741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10136375 + 10136376.

It is an arithmetic number, because the mean of its divisors is an integer number (10136376).

Almost surely, 2^20272751 is an apocalyptic number.

20272751 is a deficient number, since it is larger than the sum of its proper divisors (1).

20272751 is an equidigital number, since it uses as much as digits as its factorization.

20272751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 20272751 is about 4502.5271792628. The cubic root of 20272751 is about 272.6701280306.

Adding to 20272751 its reverse (15727202), we get a palindrome (35999953).

The spelling of 20272751 in words is "twenty million, two hundred seventy-two thousand, seven hundred fifty-one".