21049550312 has 32 divisors (see below), whose sum is σ = 46561221120. Its totient is φ = 8730227520.

The previous prime is 21049550279. The next prime is 21049550317. The reversal of 21049550312 is 21305594012.

It is not an unprimeable number, because it can be changed into a prime (21049550317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6060923 + ... + 6064394.

It is an arithmetic number, because the mean of its divisors is an integer number (1455038160).

Almost surely, 2^21049550312 is an apocalyptic number.

It is an amenable number.

21049550312 is an abundant number, since it is smaller than the sum of its proper divisors (25511670808).

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

21049550312 is a wasteful number, since it uses less digits than its factorization.

21049550312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12125361 (or 12125357 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 21049550312 in words is "twenty-one billion, forty-nine million, five hundred fifty thousand, three hundred twelve".