21404114404 has 12 divisors (see below), whose sum is σ = 37520369964. Its totient is φ = 10684008704.

The previous prime is 21404114399. The next prime is 21404114437. The reversal of 21404114404 is 40441140412.

It can be written as a sum of positive squares in 2 ways, for example, as 10379534400 + 11024580004 = 101880^2 + 104998^2 .

It is a super-2 number, since 2×21404114404² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4509457 + ... + 4514200.

It is an arithmetic number, because the mean of its divisors is an integer number (3126697497).

Almost surely, 2^21404114404 is an apocalyptic number.

It is an amenable number.

21404114404 is a deficient number, since it is larger than the sum of its proper divisors (16116255560).

21404114404 is a wasteful number, since it uses less digits than its factorization.

21404114404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9024254 (or 9024252 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21404114404 its reverse (40441140412), we get a palindrome (61845254816).

The spelling of 21404114404 in words is "twenty-one billion, four hundred four million, one hundred fourteen thousand, four hundred four".