20573629 has 4 divisors (see below), whose sum is σ = 20619900. Its totient is φ = 20527360.

The previous prime is 20573627. The next prime is 20573633. The reversal of 20573629 is 92637502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18020025 + 2553604 = 4245^2 + 1598^2 .

It is a cyclic number.

It is not a de Polignac number, because 20573629 - 2¹ = 20573627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20573594 and 20573603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20573627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22462 + ... + 23359.

It is an arithmetic number, because the mean of its divisors is an integer number (5154975).

Almost surely, 2^20573629 is an apocalyptic number.

It is an amenable number.

20573629 is a deficient number, since it is larger than the sum of its proper divisors (46271).

20573629 is an equidigital number, since it uses as much as digits as its factorization.

20573629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46270.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 20573629 is about 4535.8162440734. The cubic root of 20573629 is about 274.0124534805.

The spelling of 20573629 in words is "twenty million, five hundred seventy-three thousand, six hundred twenty-nine".