21443352354 has 48 divisors (see below), whose sum is σ = 47714317560. Its totient is φ = 6955787520.

The previous prime is 21443352349. The next prime is 21443352377. The reversal of 21443352354 is 45325334412.

21443352354 is a `hidden beast` number, since 214 + 43 + 3 + 52 + 354 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20046312225 + 1397040129 = 141585^2 + 37377^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256392 + ... + 329580.

Almost surely, 2^21443352354 is an apocalyptic number.

21443352354 is an abundant number, since it is smaller than the sum of its proper divisors (26270965206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21443352354 is a wasteful number, since it uses less digits than its factorization.

21443352354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73635 (or 73632 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

Adding to 21443352354 its reverse (45325334412), we get a palindrome (66768686766).

It can be divided in two parts, 2144335 and 2354, that added together give a cube (2146689 = 129³).

The spelling of 21443352354 in words is "twenty-one billion, four hundred forty-three million, three hundred fifty-two thousand, three hundred fifty-four".