21434331433 has 16 divisors (see below), whose sum is σ = 23581152000. Its totient is φ = 19403822592.

The previous prime is 21434331409. The next prime is 21434331469. The reversal of 21434331433 is 33413343412.

It is a cyclic number.

It is not a de Polignac number, because 21434331433 - 2⁹ = 21434330921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21434331395 and 21434331404.

It is not an unprimeable number, because it can be changed into a prime (21434931433) 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, 147073 + ... + 253966.

It is an arithmetic number, because the mean of its divisors is an integer number (1473822000).

Almost surely, 2^21434331433 is an apocalyptic number.

It is an amenable number.

21434331433 is a deficient number, since it is larger than the sum of its proper divisors (2146820567).

21434331433 is a wasteful number, since it uses less digits than its factorization.

21434331433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401184.

The product of its digits is 31104, while the sum is 31.

Adding to 21434331433 its reverse (33413343412), we get a palindrome (54847674845).

The spelling of 21434331433 in words is "twenty-one billion, four hundred thirty-four million, three hundred thirty-one thousand, four hundred thirty-three".