21404024012033 has 12 divisors (see below), whose sum is σ = 23614442935740. Its totient is φ = 19384776455616.

The previous prime is 21404024012029. The next prime is 21404024012053. The reversal of 21404024012033 is 33021042040412.

It can be written as a sum of positive squares in 6 ways, for example, as 2423215262224 + 18980808749809 = 1556668^2 + 4356697^2 .

It is not a de Polignac number, because 21404024012033 - 2² = 21404024012029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21404024011993 and 21404024012011.

It is not an unprimeable number, because it can be changed into a prime (21404024012053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1194812078 + ... + 1194829991.

It is an arithmetic number, because the mean of its divisors is an integer number (1967870244645).

Almost surely, 2^{21404024012033} is an apocalyptic number.

It is an amenable number.

21404024012033 is a deficient number, since it is larger than the sum of its proper divisors (2210418923707).

21404024012033 is a wasteful number, since it uses less digits than its factorization.

21404024012033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389642148 (or 2389642135 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21404024012033 its reverse (33021042040412), we get a palindrome (54425066052445).

The spelling of 21404024012033 in words is "twenty-one trillion, four hundred four billion, twenty-four million, twelve thousand, thirty-three".