21102433443 has 96 divisors (see below), whose sum is σ = 40224179520. Its totient is φ = 10829790720.

The previous prime is 21102433409. The next prime is 21102433447. The reversal of 21102433443 is 34433420112.

21102433443 is a `hidden beast` number, since 211 + 0 + 2 + 4 + 3 + 3 + 443 = 666.

It is not a de Polignac number, because 21102433443 - 2⁶ = 21102433379 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (21102433447) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 619783 + ... + 652943.

It is an arithmetic number, because the mean of its divisors is an integer number (419001870).

Almost surely, 2^21102433443 is an apocalyptic number.

21102433443 is a deficient number, since it is larger than the sum of its proper divisors (19121746077).

21102433443 is a wasteful number, since it uses less digits than its factorization.

21102433443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33234 (or 33221 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21102433443 its reverse (34433420112), we get a palindrome (55535853555).

The spelling of 21102433443 in words is "twenty-one billion, one hundred two million, four hundred thirty-three thousand, four hundred forty-three".