20687482 has 4 divisors (see below), whose sum is σ = 31031226. Its totient is φ = 10343740.

The previous prime is 20687467. The next prime is 20687489. The reversal of 20687482 is 28478602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28478602 = 2 ⋅14239301.

It can be written as a sum of positive squares in only one way, i.e., 17732521 + 2954961 = 4211^2 + 1719^2 .

It is not an unprimeable number, because it can be changed into a prime (20687489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5171869 + ... + 5171872.

Almost surely, 2^20687482 is an apocalyptic number.

20687482 is a deficient number, since it is larger than the sum of its proper divisors (10343744).

20687482 is a wasteful number, since it uses less digits than its factorization.

20687482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343743.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 20687482 is about 4548.3493709257. The cubic root of 20687482 is about 274.5169790969.

The spelling of 20687482 in words is "twenty million, six hundred eighty-seven thousand, four hundred eighty-two".