20273646 has 16 divisors (see below), whose sum is σ = 42681600. Its totient is φ = 6402168.

The previous prime is 20273641. The next prime is 20273647. The reversal of 20273646 is 64637202.

It is a super-2 number, since 2×20273646² = 822041444266632, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20273641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88806 + ... + 89033.

It is an arithmetic number, because the mean of its divisors is an integer number (2667600).

Almost surely, 2^20273646 is an apocalyptic number.

20273646 is an abundant number, since it is smaller than the sum of its proper divisors (22407954).

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

20273646 is a wasteful number, since it uses less digits than its factorization.

20273646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177863.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 20273646 is about 4502.6265667941. The cubic root of 20273646 is about 272.6741405789.

The spelling of 20273646 in words is "twenty million, two hundred seventy-three thousand, six hundred forty-six".