21412003433 has 12 divisors (see below), whose sum is σ = 22392617940. Its totient is φ = 20472646656.

The previous prime is 21412003411. The next prime is 21412003453. The reversal of 21412003433 is 33430021412.

It can be written as a sum of positive squares in 2 ways, for example, as 5618551849 + 15793451584 = 74957^2 + 125672^2 .

It is a de Polignac number, because none of the positive numbers 2^k-21412003433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21412003399 and 21412003408.

It is not an unprimeable number, because it can be changed into a prime (21412003453) 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, 1563785 + ... + 1577417.

It is an arithmetic number, because the mean of its divisors is an integer number (1866051495).

Almost surely, 2^21412003433 is an apocalyptic number.

21412003433 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21412003433 is a deficient number, since it is larger than the sum of its proper divisors (980614507).

21412003433 is a wasteful number, since it uses less digits than its factorization.

21412003433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16648 (or 16625 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21412003433 its reverse (33430021412), we get a palindrome (54842024845).

The spelling of 21412003433 in words is "twenty-one billion, four hundred twelve million, three thousand, four hundred thirty-three".