21433143431 has 8 divisors (see below), whose sum is σ = 25935904800. Its totient is φ = 17290603008.

The previous prime is 21433143373. The next prime is 21433143451. The reversal of 21433143431 is 13434133412.

It is a happy number.

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

It is not a de Polignac number, because 21433143431 - 2⁶ = 21433143367 is a prime.

It is a super-2 number, since 2×21433143431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21433143394 and 21433143403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433143451) 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, 90055106 + ... + 90055343.

It is an arithmetic number, because the mean of its divisors is an integer number (3241988100).

Almost surely, 2^21433143431 is an apocalyptic number.

21433143431 is a deficient number, since it is larger than the sum of its proper divisors (4502761369).

21433143431 is a wasteful number, since it uses less digits than its factorization.

21433143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180110473.

The product of its digits is 10368, while the sum is 29.

Adding to 21433143431 its reverse (13434133412), we get a palindrome (34867276843).

The spelling of 21433143431 in words is "twenty-one billion, four hundred thirty-three million, one hundred forty-three thousand, four hundred thirty-one".