20115401 has 4 divisors (see below), whose sum is σ = 20456400. Its totient is φ = 19774404.

The previous prime is 20115397. The next prime is 20115413. The reversal of 20115401 is 10451102.

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 20115401 - 2² = 20115397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20115451) 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, 170411 + ... + 170528.

It is an arithmetic number, because the mean of its divisors is an integer number (5114100).

Almost surely, 2^20115401 is an apocalyptic number.

It is an amenable number.

20115401 is a deficient number, since it is larger than the sum of its proper divisors (340999).

20115401 is an equidigital number, since it uses as much as digits as its factorization.

20115401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340998.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 20115401 is about 4485.0196209158. The cubic root of 20115401 is about 271.9628382405.

Adding to 20115401 its reverse (10451102), we get a palindrome (30566503).

The spelling of 20115401 in words is "twenty million, one hundred fifteen thousand, four hundred one".