20602287 has 6 divisors (see below), whose sum is σ = 29758872. Its totient is φ = 13734852.

The previous prime is 20602277. The next prime is 20602291. The reversal of 20602287 is 78220602.

It is not a de Polignac number, because 20602287 - 2⁶ = 20602223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20602287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20602207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1144563 + ... + 1144580.

It is an arithmetic number, because the mean of its divisors is an integer number (4959812).

Almost surely, 2^20602287 is an apocalyptic number.

20602287 is a deficient number, since it is larger than the sum of its proper divisors (9156585).

20602287 is a wasteful number, since it uses less digits than its factorization.

20602287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289149 (or 2289146 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20602287 is about 4538.9742233240. The cubic root of 20602287 is about 274.1396228389.

Adding to 20602287 its reverse (78220602), we get a palindrome (98822889).

The spelling of 20602287 in words is "twenty million, six hundred two thousand, two hundred eighty-seven".