20401131401 has 16 divisors (see below), whose sum is σ = 24728799744. Its totient is φ = 16430244864.

The previous prime is 20401131389. The next prime is 20401131407. The reversal of 20401131401 is 10413110402.

It is a happy number.

It is not a de Polignac number, because 20401131401 - 2¹⁰ = 20401130377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20401131401.

It is not an unprimeable number, because it can be changed into a prime (20401131407) 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 15 ways as a sum of consecutive naturals, for example, 73985 + ... + 215118.

It is an arithmetic number, because the mean of its divisors is an integer number (1545549984).

Almost surely, 2^20401131401 is an apocalyptic number.

It is an amenable number.

20401131401 is a deficient number, since it is larger than the sum of its proper divisors (4327668343).

20401131401 is a wasteful number, since it uses less digits than its factorization.

20401131401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289720.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20401131401 its reverse (10413110402), we get a palindrome (30814241803).

The spelling of 20401131401 in words is "twenty billion, four hundred one million, one hundred thirty-one thousand, four hundred one".