20407141 has 4 divisors (see below), whose sum is σ = 21294432. Its totient is φ = 19519852.

The previous prime is 20407129. The next prime is 20407181. The reversal of 20407141 is 14170402.

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 20407141 - 2²³ = 12018533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20407181) 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, 443611 + ... + 443656.

It is an arithmetic number, because the mean of its divisors is an integer number (5323608).

Almost surely, 2^20407141 is an apocalyptic number.

It is an amenable number.

20407141 is a deficient number, since it is larger than the sum of its proper divisors (887291).

20407141 is an equidigital number, since it uses as much as digits as its factorization.

20407141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887290.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 20407141 is about 4517.4263690734. The cubic root of 20407141 is about 273.2713202896.

Adding to 20407141 its reverse (14170402), we get a palindrome (34577543).

The spelling of 20407141 in words is "twenty million, four hundred seven thousand, one hundred forty-one".