20001401 has 12 divisors (see below), whose sum is σ = 24284928. Its totient is φ = 16133952.

The previous prime is 20001389. The next prime is 20001439. The reversal of 20001401 is 10410002.

It is not a de Polignac number, because 20001401 - 2¹⁰ = 20000377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2921 + ... + 6966.

It is an arithmetic number, because the mean of its divisors is an integer number (2023744).

Almost surely, 2^20001401 is an apocalyptic number.

It is an amenable number.

20001401 is a deficient number, since it is larger than the sum of its proper divisors (4283527).

20001401 is an equidigital number, since it uses as much as digits as its factorization.

20001401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9928 (or 9911 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20001401 is about 4472.2925888184. The cubic root of 20001401 is about 271.4480996766.

Adding to 20001401 its reverse (10410002), we get a palindrome (30411403).

It can be divided in two parts, 20001 and 401, that added together give a palindrome (20402).

The spelling of 20001401 in words is "twenty million, one thousand, four hundred one".