21574533376 has 36 divisors (see below), whose sum is σ = 46979778384. Its totient is φ = 9806604800.

The previous prime is 21574533373. The next prime is 21574533443. The reversal of 21574533376 is 67333547512.

It is not an unprimeable number, because it can be changed into a prime (21574533373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3827890 + ... + 3833521.

It is an arithmetic number, because the mean of its divisors is an integer number (1304993844).

Almost surely, 2^21574533376 is an apocalyptic number.

It is an amenable number.

21574533376 is an abundant number, since it is smaller than the sum of its proper divisors (25405245008).

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

21574533376 is an equidigital number, since it uses as much as digits as its factorization.

21574533376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7661438 (or 7661424 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 46.

The spelling of 21574533376 in words is "twenty-one billion, five hundred seventy-four million, five hundred thirty-three thousand, three hundred seventy-six".