20725201 has 8 divisors (see below), whose sum is σ = 23829120. Its totient is φ = 17657088.

The previous prime is 20725171. The next prime is 20725241. The reversal of 20725201 is 10252702.

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 20725201 - 2²³ = 12336593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20725241) 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, 7696 + ... + 10033.

It is an arithmetic number, because the mean of its divisors is an integer number (2978640).

Almost surely, 2^20725201 is an apocalyptic number.

It is an amenable number.

20725201 is a deficient number, since it is larger than the sum of its proper divisors (3103919).

20725201 is a wasteful number, since it uses less digits than its factorization.

20725201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17903.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 20725201 is about 4552.4939319015. The cubic root of 20725201 is about 274.6837179209.

Adding to 20725201 its reverse (10252702), we get a palindrome (30977903).

The spelling of 20725201 in words is "twenty million, seven hundred twenty-five thousand, two hundred one".