20601243 has 16 divisors (see below), whose sum is σ = 32868640. Its totient is φ = 12677472.

The previous prime is 20601241. The next prime is 20601247. The reversal of 20601243 is 34210602.

It is a happy number.

20601243 is a `hidden beast` number, since 20 + 601 + 2 + 43 = 666.

It is not a de Polignac number, because 20601243 - 2¹ = 20601241 is a prime.

It is a super-2 number, since 2×20601243² = 848822426290098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20601241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28996 + ... + 29697.

It is an arithmetic number, because the mean of its divisors is an integer number (2054290).

Almost surely, 2^20601243 is an apocalyptic number.

20601243 is a deficient number, since it is larger than the sum of its proper divisors (12267397).

20601243 is a wasteful number, since it uses less digits than its factorization.

20601243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58715 (or 58709 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20601243 is about 4538.8592179093. The cubic root of 20601243 is about 274.1349921783.

Adding to 20601243 its reverse (34210602), we get a palindrome (54811845).

The spelling of 20601243 in words is "twenty million, six hundred one thousand, two hundred forty-three".