20147273 has 2 divisors, whose sum is σ = 20147274. Its totient is φ = 20147272.

The previous prime is 20147251. The next prime is 20147297. The reversal of 20147273 is 37274102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19123129 + 1024144 = 4373^2 + 1012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20147273 is a prime.

It is a super-3 number, since 3×20147273³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20140273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10073636 + 10073637.

It is an arithmetic number, because the mean of its divisors is an integer number (10073637).

Almost surely, 2^20147273 is an apocalyptic number.

It is an amenable number.

20147273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20147273 is an equidigital number, since it uses as much as digits as its factorization.

20147273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20147273 is about 4488.5713762844. The cubic root of 20147273 is about 272.1064003065.

It can be divided in two parts, 201 and 47273, that added together give a palindrome (47474).

The spelling of 20147273 in words is "twenty million, one hundred forty-seven thousand, two hundred seventy-three".