21404343033 has 12 divisors (see below), whose sum is σ = 31289884080. Its totient is φ = 14097639096.

The previous prime is 21404343019. The next prime is 21404343071. The reversal of 21404343033 is 33034340412.

It is not a de Polignac number, because 21404343033 - 2¹⁴ = 21404326649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21404342988 and 21404343006.

It is not an unprimeable number, because it can be changed into a prime (21404743033) 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, 14326123 + ... + 14327616.

It is an arithmetic number, because the mean of its divisors is an integer number (2607490340).

Almost surely, 2^21404343033 is an apocalyptic number.

It is an amenable number.

21404343033 is a deficient number, since it is larger than the sum of its proper divisors (9885541047).

21404343033 is a wasteful number, since it uses less digits than its factorization.

21404343033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28653828 (or 28653825 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21404343033 its reverse (33034340412), we get a palindrome (54438683445).

The spelling of 21404343033 in words is "twenty-one billion, four hundred four million, three hundred forty-three thousand, thirty-three".