20872501 has 8 divisors (see below), whose sum is σ = 23001440. Its totient is φ = 18818352.

The previous prime is 20872499. The next prime is 20872571. The reversal of 20872501 is 10527802.

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 20872501 - 2¹ = 20872499 is a prime.

It is a super-2 number, since 2×20872501² = 871322595990002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20872571) 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, 18111 + ... + 19228.

It is an arithmetic number, because the mean of its divisors is an integer number (2875180).

Almost surely, 2^20872501 is an apocalyptic number.

It is an amenable number.

20872501 is a deficient number, since it is larger than the sum of its proper divisors (2128939).

20872501 is a wasteful number, since it uses less digits than its factorization.

20872501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37395.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20872501 is about 4568.6432340466. The cubic root of 20872501 is about 275.3329345043.

The spelling of 20872501 in words is "twenty million, eight hundred seventy-two thousand, five hundred one".