20072501 has 4 divisors (see below), whose sum is σ = 20279532. Its totient is φ = 19865472.

The previous prime is 20072497. The next prime is 20072509. The reversal of 20072501 is 10527002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6002500 + 14070001 = 2450^2 + 3751^2 .

It is a cyclic number.

It is not a de Polignac number, because 20072501 - 2² = 20072497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20072501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20072509) 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, 103370 + ... + 103563.

It is an arithmetic number, because the mean of its divisors is an integer number (5069883).

Almost surely, 2^20072501 is an apocalyptic number.

It is an amenable number.

20072501 is a deficient number, since it is larger than the sum of its proper divisors (207031).

20072501 is an equidigital number, since it uses as much as digits as its factorization.

20072501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207030.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 20072501 is about 4480.2344804709. The cubic root of 20072501 is about 271.7693627737.

Adding to 20072501 its reverse (10527002), we get a palindrome (30599503).

The spelling of 20072501 in words is "twenty million, seventy-two thousand, five hundred one".