20010401 has 4 divisors (see below), whose sum is σ = 21063600. Its totient is φ = 18957204.

The previous prime is 20010373. The next prime is 20010409. The reversal of 20010401 is 10401002.

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 20010401 - 2¹⁰ = 20009377 is a prime.

It is a super-2 number, since 2×20010401² = 800832296361602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526571 + ... + 526608.

It is an arithmetic number, because the mean of its divisors is an integer number (5265900).

Almost surely, 2^20010401 is an apocalyptic number.

It is an amenable number.

20010401 is a deficient number, since it is larger than the sum of its proper divisors (1053199).

20010401 is a wasteful number, since it uses less digits than its factorization.

20010401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053198.

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

The square root of 20010401 is about 4473.2986710033. The cubic root of 20010401 is about 271.4888079343.

Adding to 20010401 its reverse (10401002), we get a palindrome (30411403).

It can be divided in two parts, 200 and 10401, that added together give a palindrome (10601).

The spelling of 20010401 in words is "twenty million, ten thousand, four hundred one".