20440683 has 24 divisors (see below), whose sum is σ = 30232800. Its totient is φ = 13305600.

The previous prime is 20440649. The next prime is 20440691. The reversal of 20440683 is 38604402.

It is a de Polignac number, because none of the positive numbers 2^k-20440683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20440643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102618 + ... + 102816.

It is an arithmetic number, because the mean of its divisors is an integer number (1259700).

Almost surely, 2^20440683 is an apocalyptic number.

20440683 is a deficient number, since it is larger than the sum of its proper divisors (9792117).

20440683 is a wasteful number, since it uses less digits than its factorization.

20440683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20440683 is about 4521.1373569048. The cubic root of 20440683 is about 273.4209582570.

The spelling of 20440683 in words is "twenty million, four hundred forty thousand, six hundred eighty-three".