21000744332 has 6 divisors (see below), whose sum is σ = 36751302588. Its totient is φ = 10500372164.

The previous prime is 21000744307. The next prime is 21000744341. The reversal of 21000744332 is 23344700012.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625093038 + ... + 2625093045.

It is an arithmetic number, because the mean of its divisors is an integer number (6125217098).

Almost surely, 2^21000744332 is an apocalyptic number.

It is an amenable number.

21000744332 is a deficient number, since it is larger than the sum of its proper divisors (15750558256).

21000744332 is a wasteful number, since it uses less digits than its factorization.

21000744332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250186087 (or 5250186085 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The spelling of 21000744332 in words is "twenty-one billion, seven hundred forty-four thousand, three hundred thirty-two".