20072641 has 4 divisors (see below), whose sum is σ = 20167984. Its totient is φ = 19977300.

The previous prime is 20072627. The next prime is 20072651. The reversal of 20072641 is 14627002.

20072641 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20072641 - 2⁷ = 20072513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20072621) 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, 47355 + ... + 47776.

It is an arithmetic number, because the mean of its divisors is an integer number (5041996).

Almost surely, 2^20072641 is an apocalyptic number.

It is an amenable number.

20072641 is a deficient number, since it is larger than the sum of its proper divisors (95343).

20072641 is an equidigital number, since it uses as much as digits as its factorization.

20072641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95342.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20072641 is about 4480.2501046259. The cubic root of 20072641 is about 271.7699946103.

Adding to 20072641 its reverse (14627002), we get a palindrome (34699643).

The spelling of 20072641 in words is "twenty million, seventy-two thousand, six hundred forty-one".