21347260052 has 24 divisors (see below), whose sum is σ = 38573455872. Its totient is φ = 10326463200.

The previous prime is 21347260037. The next prime is 21347260069. The reversal of 21347260052 is 25006274312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467102 + ... + 510762.

It is an arithmetic number, because the mean of its divisors is an integer number (1607227328).

Almost surely, 2^21347260052 is an apocalyptic number.

It is an amenable number.

21347260052 is a deficient number, since it is larger than the sum of its proper divisors (17226195820).

21347260052 is a wasteful number, since it uses less digits than its factorization.

21347260052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47639 (or 47637 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 21347260052 in words is "twenty-one billion, three hundred forty-seven million, two hundred sixty thousand, fifty-two".