13421321433 has 16 divisors (see below), whose sum is σ = 21412935040. Its totient is φ = 8259274512.

The previous prime is 13421321411. The next prime is 13421321437. The reversal of 13421321433 is 33412312431.

It is a happy number.

13421321433 is a `hidden beast` number, since 13 + 4 + 213 + 2 + 1 + 433 = 666.

It is not a de Polignac number, because 13421321433 - 2⁶ = 13421321369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13421321397 and 13421321406.

It is not an unprimeable number, because it can be changed into a prime (13421321437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19118341 + ... + 19119042.

It is an arithmetic number, because the mean of its divisors is an integer number (1338308440).

Almost surely, 2^13421321433 is an apocalyptic number.

13421321433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13421321433 is a deficient number, since it is larger than the sum of its proper divisors (7991613607).

13421321433 is a wasteful number, since it uses less digits than its factorization.

13421321433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38237405 (or 38237399 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 13421321433 its reverse (33412312431), we get a palindrome (46833633864).

The spelling of 13421321433 in words is "thirteen billion, four hundred twenty-one million, three hundred twenty-one thousand, four hundred thirty-three".