20740307 has 16 divisors (see below), whose sum is σ = 24883200. Its totient is φ = 16910880.

The previous prime is 20740297. The next prime is 20740351. The reversal of 20740307 is 70304702.

It is not a de Polignac number, because 20740307 - 2¹⁰ = 20739283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20740397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13694 + ... + 15132.

It is an arithmetic number, because the mean of its divisors is an integer number (1555200).

Almost surely, 2^20740307 is an apocalyptic number.

20740307 is a deficient number, since it is larger than the sum of its proper divisors (4142893).

20740307 is a wasteful number, since it uses less digits than its factorization.

20740307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546.

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 20740307 is about 4554.1527203202. The cubic root of 20740307 is about 274.7504380544.

The spelling of 20740307 in words is "twenty million, seven hundred forty thousand, three hundred seven".