21431401134404 has 12 divisors (see below), whose sum is σ = 37504987503228. Its totient is φ = 10715690419200.

The previous prime is 21431401134401. The next prime is 21431401134433. The reversal of 21431401134404 is 40443110413412.

It can be written as a sum of positive squares in 2 ways, for example, as 15385221760000 + 6046179374404 = 3922400^2 + 2458898^2 .

It is not an unprimeable number, because it can be changed into a prime (21431401134401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4206164 + ... + 7781684.

It is an arithmetic number, because the mean of its divisors is an integer number (3125415625269).

Almost surely, 2^{21431401134404} is an apocalyptic number.

It is an amenable number.

21431401134404 is a deficient number, since it is larger than the sum of its proper divisors (16073586368824).

21431401134404 is a wasteful number, since it uses less digits than its factorization.

21431401134404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074006 (or 5074004 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 21431401134404 its reverse (40443110413412), we get a palindrome (61874511547816).

The spelling of 21431401134404 in words is "twenty-one trillion, four hundred thirty-one billion, four hundred one million, one hundred thirty-four thousand, four hundred four".