21400543110404 has 12 divisors (see below), whose sum is σ = 37459694566224. Its totient is φ = 10697773234344.

The previous prime is 21400543110379. The next prime is 21400543110407. The reversal of 21400543110404 is 40401134500412.

It is a super-2 number, since 2×21400543110404² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21400543110407) 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, 624560942 + ... + 624595205.

It is an arithmetic number, because the mean of its divisors is an integer number (3121641213852).

Almost surely, 2^{21400543110404} is an apocalyptic number.

It is an amenable number.

21400543110404 is a deficient number, since it is larger than the sum of its proper divisors (16059151455820).

21400543110404 is a wasteful number, since it uses less digits than its factorization.

21400543110404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249160434 (or 1249160432 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 21400543110404 its reverse (40401134500412), we get a palindrome (61801677610816).

The spelling of 21400543110404 in words is "twenty-one trillion, four hundred billion, five hundred forty-three million, one hundred ten thousand, four hundred four".