21574533374 has 16 divisors (see below), whose sum is σ = 32586786000. Its totient is φ = 10712306304.

The previous prime is 21574533373. The next prime is 21574533443. The reversal of 21574533374 is 47333547512.

It is a congruent number.

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2097857 + ... + 2108115.

It is an arithmetic number, because the mean of its divisors is an integer number (2036674125).

Almost surely, 2^21574533374 is an apocalyptic number.

21574533374 is a deficient number, since it is larger than the sum of its proper divisors (11012252626).

21574533374 is a wasteful number, since it uses less digits than its factorization.

21574533374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17467.

The product of its digits is 1058400, while the sum is 44.

The spelling of 21574533374 in words is "twenty-one billion, five hundred seventy-four million, five hundred thirty-three thousand, three hundred seventy-four".