20732746 has 8 divisors (see below), whose sum is σ = 31118724. Its totient is φ = 10359840.

The previous prime is 20732737. The next prime is 20732759. The reversal of 20732746 is 64723702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14784025 + 5948721 = 3845^2 + 2439^2 .

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

It is a zygodrome in base 3.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3516 + ... + 7336.

Almost surely, 2^20732746 is an apocalyptic number.

20732746 is a deficient number, since it is larger than the sum of its proper divisors (10385978).

20732746 is a wasteful number, since it uses less digits than its factorization.

20732746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6536.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20732746 is about 4553.3225231692. The cubic root of 20732746 is about 274.7170467043.

The spelling of 20732746 in words is "twenty million, seven hundred thirty-two thousand, seven hundred forty-six".