20746307 has 8 divisors (see below), whose sum is σ = 22561056. Its totient is φ = 18997632.

The previous prime is 20746303. The next prime is 20746351. The reversal of 20746307 is 70364702.

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 20746307 - 2² = 20746303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20746307.

It is not an unprimeable number, because it can be changed into a prime (20746301) 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, 15863 + ... + 17120.

It is an arithmetic number, because the mean of its divisors is an integer number (2820132).

Almost surely, 2^20746307 is an apocalyptic number.

20746307 is a deficient number, since it is larger than the sum of its proper divisors (1814749).

20746307 is a wasteful number, since it uses less digits than its factorization.

20746307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33037.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 20746307 is about 4554.8114121224. The cubic root of 20746307 is about 274.7769298462.

The spelling of 20746307 in words is "twenty million, seven hundred forty-six thousand, three hundred seven".