21133555246 has 8 divisors (see below), whose sum is σ = 31700951280. Its totient is φ = 10566571488.

The previous prime is 21133555243. The next prime is 21133555249. The reversal of 21133555246 is 64255533112.

It is an interprime number because it is at equal distance from previous prime (21133555243) and next prime (21133555249).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133555243) 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 in 3 ways as a sum of consecutive naturals, for example, 135855 + ... + 246421.

It is an arithmetic number, because the mean of its divisors is an integer number (3962618910).

Almost surely, 2^21133555246 is an apocalyptic number.

21133555246 is a deficient number, since it is larger than the sum of its proper divisors (10567396034).

21133555246 is a wasteful number, since it uses less digits than its factorization.

21133555246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206138.

The product of its digits is 108000, while the sum is 37.

The spelling of 21133555246 in words is "twenty-one billion, one hundred thirty-three million, five hundred fifty-five thousand, two hundred forty-six".