21342113433 has 12 divisors (see below), whose sum is σ = 30855871488. Its totient is φ = 14214979800.

The previous prime is 21342113407. The next prime is 21342113459. The reversal of 21342113433 is 33431124312.

It is a happy number.

21342113433 is a `hidden beast` number, since 2 + 13 + 4 + 211 + 3 + 433 = 666.

It is an interprime number because it is at equal distance from previous prime (21342113407) and next prime (21342113459).

It is not a de Polignac number, because 21342113433 - 2⁹ = 21342112921 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21342113397 and 21342113406.

It is not an unprimeable number, because it can be changed into a prime (21342112433) 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, 1080993 + ... + 1100558.

It is an arithmetic number, because the mean of its divisors is an integer number (2571322624).

Almost surely, 2^21342113433 is an apocalyptic number.

It is an amenable number.

21342113433 is a deficient number, since it is larger than the sum of its proper divisors (9513758055).

21342113433 is a wasteful number, since it uses less digits than its factorization.

21342113433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182644 (or 2182641 counting only the distinct ones).

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

Adding to 21342113433 its reverse (33431124312), we get a palindrome (54773237745).

The spelling of 21342113433 in words is "twenty-one billion, three hundred forty-two million, one hundred thirteen thousand, four hundred thirty-three".