21041555324 has 6 divisors (see below), whose sum is σ = 36822721824. Its totient is φ = 10520777660.

The previous prime is 21041555323. The next prime is 21041555357. The reversal of 21041555324 is 42355514012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041555323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630194412 + ... + 2630194419.

It is an arithmetic number, because the mean of its divisors is an integer number (6137120304).

Almost surely, 2^21041555324 is an apocalyptic number.

It is an amenable number.

21041555324 is a deficient number, since it is larger than the sum of its proper divisors (15781166500).

21041555324 is a wasteful number, since it uses less digits than its factorization.

21041555324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260388835 (or 5260388833 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 21041555324 in words is "twenty-one billion, forty-one million, five hundred fifty-five thousand, three hundred twenty-four".