21448307574 has 32 divisors (see below), whose sum is σ = 47714880000. Its totient is φ = 7141639752.

The previous prime is 21448307557. The next prime is 21448307603. The reversal of 21448307574 is 47570384412.

21448307574 is a `hidden beast` number, since 2 + 1 + 4 + 48 + 30 + 7 + 574 = 666.

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, 166474 + ... + 265725.

It is an arithmetic number, because the mean of its divisors is an integer number (1491090000).

Almost surely, 2^21448307574 is an apocalyptic number.

21448307574 is an abundant number, since it is smaller than the sum of its proper divisors (26266572426).

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

21448307574 is a wasteful number, since it uses less digits than its factorization.

21448307574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433129 (or 433123 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 21448307574 in words is "twenty-one billion, four hundred forty-eight million, three hundred seven thousand, five hundred seventy-four".