20746633 has 4 divisors (see below), whose sum is σ = 20802628. Its totient is φ = 20690640.

The previous prime is 20746631. The next prime is 20746639. The reversal of 20746633 is 33664702.

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 5442889 + 15303744 = 2333^2 + 3912^2 .

It is a cyclic number.

It is not a de Polignac number, because 20746633 - 2¹ = 20746631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20746595 and 20746604.

It is not an unprimeable number, because it can be changed into a prime (20746631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27438 + ... + 28183.

It is an arithmetic number, because the mean of its divisors is an integer number (5200657).

Almost surely, 2^20746633 is an apocalyptic number.

It is an amenable number.

20746633 is a deficient number, since it is larger than the sum of its proper divisors (55995).

20746633 is an equidigital number, since it uses as much as digits as its factorization.

20746633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55994.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 20746633 is about 4554.8471983152. The cubic root of 20746633 is about 274.7783690873.

The spelling of 20746633 in words is "twenty million, seven hundred forty-six thousand, six hundred thirty-three".