20601247 has 2 divisors, whose sum is σ = 20601248. Its totient is φ = 20601246.

The previous prime is 20601241. The next prime is 20601271. The reversal of 20601247 is 74210602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20601247 - 2¹¹ = 20599199 is a prime.

It is a super-2 number, since 2×20601247² = 848822755910018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20601241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10300623 + 10300624.

It is an arithmetic number, because the mean of its divisors is an integer number (10300624).

Almost surely, 2^20601247 is an apocalyptic number.

20601247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20601247 is an equidigital number, since it uses as much as digits as its factorization.

20601247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20601247 is about 4538.8596585486. The cubic root of 20601247 is about 274.1350099206.

Adding to 20601247 its reverse (74210602), we get a palindrome (94811849).

The spelling of 20601247 in words is "twenty million, six hundred one thousand, two hundred forty-seven".