21053764248 has 32 divisors (see below), whose sum is σ = 57419357760. Its totient is φ = 6379928480.

The previous prime is 21053764231. The next prime is 21053764253. The reversal of 21053764248 is 84246735012.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 39874290 + ... + 39874817.

It is an arithmetic number, because the mean of its divisors is an integer number (1794354930).

Almost surely, 2^21053764248 is an apocalyptic number.

It is an amenable number.

21053764248 is an abundant number, since it is smaller than the sum of its proper divisors (36365593512).

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

21053764248 is a wasteful number, since it uses less digits than its factorization.

21053764248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79749127 (or 79749123 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 21053764248 in words is "twenty-one billion, fifty-three million, seven hundred sixty-four thousand, two hundred forty-eight".