21348521350 has 24 divisors (see below), whose sum is σ = 42762731760. Its totient is φ = 7882530720.

The previous prime is 21348521267. The next prime is 21348521357. The reversal of 21348521350 is 5312584312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21348521357) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 16421290 + ... + 16422589.

It is an arithmetic number, because the mean of its divisors is an integer number (1781780490).

Almost surely, 2^21348521350 is an apocalyptic number.

21348521350 is an abundant number, since it is smaller than the sum of its proper divisors (21414210410).

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

21348521350 is a wasteful number, since it uses less digits than its factorization.

21348521350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32843904 (or 32843899 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 21348521350 in words is "twenty-one billion, three hundred forty-eight million, five hundred twenty-one thousand, three hundred fifty".