20601647 has 8 divisors (see below), whose sum is σ = 22602240. Its totient is φ = 18622360.

The previous prime is 20601617. The next prime is 20601667. The reversal of 20601647 is 74610602.

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 20601647 - 2²² = 16407343 is a prime.

It is a super-2 number, since 2×20601647² = 848855718225218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601617) 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, 3263 + ... + 7200.

It is an arithmetic number, because the mean of its divisors is an integer number (2825280).

Almost surely, 2^20601647 is an apocalyptic number.

20601647 is a deficient number, since it is larger than the sum of its proper divisors (2000593).

20601647 is a wasteful number, since it uses less digits than its factorization.

20601647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10653.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20601647 is about 4538.9037222660. The cubic root of 20601647 is about 274.1367841383.

The spelling of 20601647 in words is "twenty million, six hundred one thousand, six hundred forty-seven".