20601287 has 8 divisors (see below), whose sum is σ = 23686656. Its totient is φ = 17551512.

The previous prime is 20601283. The next prime is 20601319. The reversal of 20601287 is 78210602.

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 20601287 - 2² = 20601283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7643 + ... + 9980.

It is an arithmetic number, because the mean of its divisors is an integer number (2960832).

Almost surely, 2^20601287 is an apocalyptic number.

20601287 is a deficient number, since it is larger than the sum of its proper divisors (3085369).

20601287 is a wasteful number, since it uses less digits than its factorization.

20601287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17797.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20601287 is about 4538.8640649396. The cubic root of 20601287 is about 274.1351873434.

Adding to 20601287 its reverse (78210602), we get a palindrome (98811889).

The spelling of 20601287 in words is "twenty million, six hundred one thousand, two hundred eighty-seven".