21440412033 has 8 divisors (see below), whose sum is σ = 28588200768. Its totient is φ = 14293115664.

The previous prime is 21440412029. The next prime is 21440412083. The reversal of 21440412033 is 33021404412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21440412033 - 2² = 21440412029 is a prime.

It is a super-2 number, since 2×21440412033² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21440411994 and 21440412012.

It is not an unprimeable number, because it can be changed into a prime (21440412023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5410 + ... + 207147.

It is an arithmetic number, because the mean of its divisors is an integer number (3573525096).

Almost surely, 2^21440412033 is an apocalyptic number.

It is an amenable number.

21440412033 is a deficient number, since it is larger than the sum of its proper divisors (7147788735).

21440412033 is a wasteful number, since it uses less digits than its factorization.

21440412033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246183.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21440412033 its reverse (33021404412), we get a palindrome (54461816445).

The spelling of 21440412033 in words is "twenty-one billion, four hundred forty million, four hundred twelve thousand, thirty-three".