20608487 has 4 divisors (see below), whose sum is σ = 20673816. Its totient is φ = 20543160.

The previous prime is 20608477. The next prime is 20608501. The reversal of 20608487 is 78480602.

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

It is a cyclic number.

It is not a de Polignac number, because 20608487 - 2¹⁰ = 20607463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20608477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32189 + ... + 32822.

It is an arithmetic number, because the mean of its divisors is an integer number (5168454).

Almost surely, 2^20608487 is an apocalyptic number.

20608487 is a deficient number, since it is larger than the sum of its proper divisors (65329).

20608487 is an equidigital number, since it uses as much as digits as its factorization.

20608487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65328.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20608487 is about 4539.6571456444. The cubic root of 20608487 is about 274.1671197085.

The spelling of 20608487 in words is "twenty million, six hundred eight thousand, four hundred eighty-seven".