20601047 has 4 divisors (see below), whose sum is σ = 20989800. Its totient is φ = 20212296.

The previous prime is 20601037. The next prime is 20601079. The reversal of 20601047 is 74010602.

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 20601047 - 2⁸ = 20600791 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 (20601037) 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, 194297 + ... + 194402.

It is an arithmetic number, because the mean of its divisors is an integer number (5247450).

Almost surely, 2^20601047 is an apocalyptic number.

20601047 is a deficient number, since it is larger than the sum of its proper divisors (388753).

20601047 is an equidigital number, since it uses as much as digits as its factorization.

20601047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388752.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 20601047 is about 4538.8376265295. The cubic root of 20601047 is about 274.1341228031.

Adding to 20601047 its reverse (74010602), we get a palindrome (94611649).

The spelling of 20601047 in words is "twenty million, six hundred one thousand, forty-seven".