20051401 has 4 divisors (see below), whose sum is σ = 20163600. Its totient is φ = 19939204.

The previous prime is 20051363. The next prime is 20051407. The reversal of 20051401 is 10415002.

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 20051401 - 2²¹ = 17954249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20051407) 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, 55831 + ... + 56188.

It is an arithmetic number, because the mean of its divisors is an integer number (5040900).

Almost surely, 2^20051401 is an apocalyptic number.

It is an amenable number.

20051401 is a deficient number, since it is larger than the sum of its proper divisors (112199).

20051401 is a wasteful number, since it uses less digits than its factorization.

20051401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112198.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20051401 is about 4477.8790738473. The cubic root of 20051401 is about 271.6741023638.

Adding to 20051401 its reverse (10415002), we get a palindrome (30466403).

The spelling of 20051401 in words is "twenty million, fifty-one thousand, four hundred one".