21404113401 has 32 divisors (see below), whose sum is σ = 32438071296. Its totient is φ = 12436344000.

The previous prime is 21404113391. The next prime is 21404113403. The reversal of 21404113401 is 10431140412.

It is not a de Polignac number, because 21404113401 - 2⁶ = 21404113337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21404113403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11691 + ... + 207231.

It is an arithmetic number, because the mean of its divisors is an integer number (1013689728).

Almost surely, 2^21404113401 is an apocalyptic number.

It is an amenable number.

21404113401 is a deficient number, since it is larger than the sum of its proper divisors (11033957895).

21404113401 is a wasteful number, since it uses less digits than its factorization.

21404113401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195693.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21404113401 its reverse (10431140412), we get a palindrome (31835253813).

The spelling of 21404113401 in words is "twenty-one billion, four hundred four million, one hundred thirteen thousand, four hundred one".