20401417 has 4 divisors (see below), whose sum is σ = 20411716. Its totient is φ = 20391120.

The previous prime is 20401397. The next prime is 20401427. The reversal of 20401417 is 71410402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8088336 + 12313081 = 2844^2 + 3509^2 .

It is a cyclic number.

It is not a de Polignac number, because 20401417 - 2²³ = 12012809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20401394 and 20401403.

It is not an unprimeable number, because it can be changed into a prime (20401427) 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, 1134 + ... + 6487.

It is an arithmetic number, because the mean of its divisors is an integer number (5102929).

Almost surely, 2^20401417 is an apocalyptic number.

It is an amenable number.

20401417 is a deficient number, since it is larger than the sum of its proper divisors (10299).

20401417 is an equidigital number, since it uses as much as digits as its factorization.

20401417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10298.

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

The square root of 20401417 is about 4516.7927780672. The cubic root of 20401417 is about 273.2457679383.

Adding to 20401417 its reverse (71410402), we get a palindrome (91811819).

The spelling of 20401417 in words is "twenty million, four hundred one thousand, four hundred seventeen".