20724201 has 16 divisors (see below), whose sum is σ = 31208320. Its totient is φ = 13588560.

The previous prime is 20724191. The next prime is 20724211. The reversal of 20724201 is 10242702.

It is an interprime number because it is at equal distance from previous prime (20724191) and next prime (20724211).

It is not a de Polignac number, because 20724201 - 2⁵ = 20724169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20724211) 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, 4645 + ... + 7938.

It is an arithmetic number, because the mean of its divisors is an integer number (1950520).

Almost surely, 2^20724201 is an apocalyptic number.

It is an amenable number.

20724201 is a deficient number, since it is larger than the sum of its proper divisors (10484119).

20724201 is a wasteful number, since it uses less digits than its factorization.

20724201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12653 (or 12647 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20724201 is about 4552.3841006664. The cubic root of 20724201 is about 274.6792999800.

Adding to 20724201 its reverse (10242702), we get a palindrome (30966903).

The spelling of 20724201 in words is "twenty million, seven hundred twenty-four thousand, two hundred one".