20602387 has 8 divisors (see below), whose sum is σ = 22564080. Its totient is φ = 18694560.

The previous prime is 20602357. The next prime is 20602409. The reversal of 20602387 is 78320602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20602387 - 2¹¹ = 20600339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20602357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12664 + ... + 14197.

It is an arithmetic number, because the mean of its divisors is an integer number (2820510).

Almost surely, 2^20602387 is an apocalyptic number.

20602387 is a deficient number, since it is larger than the sum of its proper divisors (1961693).

20602387 is a wasteful number, since it uses less digits than its factorization.

20602387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26933.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20602387 is about 4538.9852390154. The cubic root of 20602387 is about 274.1400663806.

Adding to 20602387 its reverse (78320602), we get a palindrome (98922989).

The spelling of 20602387 in words is "twenty million, six hundred two thousand, three hundred eighty-seven".