20309482 has 4 divisors (see below), whose sum is σ = 30464226. Its totient is φ = 10154740.

The previous prime is 20309453. The next prime is 20309489. The reversal of 20309482 is 28490302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13024881 + 7284601 = 3609^2 + 2699^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20309482.

It is not an unprimeable number, because it can be changed into a prime (20309489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077369 + ... + 5077372.

Almost surely, 2^20309482 is an apocalyptic number.

20309482 is a deficient number, since it is larger than the sum of its proper divisors (10154744).

20309482 is a wasteful number, since it uses less digits than its factorization.

20309482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10154743.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20309482 is about 4506.6042648540. The cubic root of 20309482 is about 272.8347069730.

Adding to 20309482 its reverse (28490302), we get a palindrome (48799784).

The spelling of 20309482 in words is "twenty million, three hundred nine thousand, four hundred eighty-two".