20313730 has 16 divisors (see below), whose sum is σ = 37111680. Its totient is φ = 8003952.

The previous prime is 20313707. The next prime is 20313731. The reversal of 20313730 is 3731302.

It is a junction number, because it is equal to n+sod(n) for n = 20313698 and 20313707.

It is not an unprimeable number, because it can be changed into a prime (20313731) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14490 + ... + 15829.

It is an arithmetic number, because the mean of its divisors is an integer number (2319480).

Almost surely, 2^20313730 is an apocalyptic number.

20313730 is a deficient number, since it is larger than the sum of its proper divisors (16797950).

20313730 is a wasteful number, since it uses less digits than its factorization.

20313730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30393.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 20313730 is about 4507.0755485126. The cubic root of 20313730 is about 272.8537279905.

The spelling of 20313730 in words is "twenty million, three hundred thirteen thousand, seven hundred thirty".