20746394 has 8 divisors (see below), whose sum is σ = 31212948. Its totient is φ = 10342080.

The previous prime is 20746393. The next prime is 20746417. The reversal of 20746394 is 49364702.

It can be written as a sum of positive squares in 2 ways, for example, as 19245769 + 1500625 = 4387^2 + 1225^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20746393) 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, 14717 + ... + 16064.

Almost surely, 2^20746394 is an apocalyptic number.

20746394 is a deficient number, since it is larger than the sum of its proper divisors (10466554).

20746394 is a wasteful number, since it uses less digits than its factorization.

20746394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31120.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20746394 is about 4554.8209624529. The cubic root of 20746394 is about 274.7773139396. Note that the first 3 decimals are identical.

The spelling of 20746394 in words is "twenty million, seven hundred forty-six thousand, three hundred ninety-four".