20273629 has 8 divisors (see below), whose sum is σ = 20606040. Its totient is φ = 19944000.

The previous prime is 20273587. The next prime is 20273641. The reversal of 20273629 is 92637202.

It can be written as a sum of positive squares in 4 ways, for example, as 5625 + 20268004 = 75^2 + 4502^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20273629 - 2⁷ = 20273501 is a prime.

It is a super-2 number, since 2×20273629² = 822040065659282, which contains 22 as substring.

It is a Duffinian number.

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 20273629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20273699) 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, 17727 + ... + 18835.

It is an arithmetic number, because the mean of its divisors is an integer number (2575755).

Almost surely, 2^20273629 is an apocalyptic number.

It is an amenable number.

20273629 is a deficient number, since it is larger than the sum of its proper divisors (332411).

20273629 is a wasteful number, since it uses less digits than its factorization.

20273629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 20273629 is about 4502.6246790067. The cubic root of 20273629 is about 272.6740643640.

It can be divided in two parts, 20273 and 629, that added together give a palindrome (20902).

The spelling of 20273629 in words is "twenty million, two hundred seventy-three thousand, six hundred twenty-nine".