20243277 has 40 divisors (see below), whose sum is σ = 32678712. Its totient is φ = 12441600.

The previous prime is 20243269. The next prime is 20243287. The reversal of 20243277 is 77234202.

It can be written as a sum of positive squares in 4 ways, for example, as 2653641 + 17589636 = 1629^2 + 4194^2 .

It is not a de Polignac number, because 20243277 - 2³ = 20243269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20243277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 83877 + ... + 84117.

Almost surely, 2^20243277 is an apocalyptic number.

20243277 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20243277 is a deficient number, since it is larger than the sum of its proper divisors (12435435).

20243277 is a wasteful number, since it uses less digits than its factorization.

20243277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20243277 is about 4499.2529379887. The cubic root of 20243277 is about 272.5379213842.

Adding to 20243277 its reverse (77234202), we get a palindrome (97477479).

The spelling of 20243277 in words is "twenty million, two hundred forty-three thousand, two hundred seventy-seven".