21443525446 has 32 divisors (see below), whose sum is σ = 36901477440. Its totient is φ = 9154861056.

The previous prime is 21443525431. The next prime is 21443525459. The reversal of 21443525446 is 64452534412.

It is a junction number, because it is equal to n+sod(n) for n = 21443525399 and 21443525408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5161306 + ... + 5165458.

It is an arithmetic number, because the mean of its divisors is an integer number (1153171170).

Almost surely, 2^21443525446 is an apocalyptic number.

21443525446 is a deficient number, since it is larger than the sum of its proper divisors (15457951994).

21443525446 is a wasteful number, since it uses less digits than its factorization.

21443525446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5488.

The product of its digits is 460800, while the sum is 40.

The spelling of 21443525446 in words is "twenty-one billion, four hundred forty-three million, five hundred twenty-five thousand, four hundred forty-six".