21350523700 has 36 divisors (see below), whose sum is σ = 50542515072. Its totient is φ = 7763826400.

The previous prime is 21350523683. The next prime is 21350523713. The reversal of 21350523700 is 732505312.

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 11 ways as a sum of consecutive naturals, for example, 9703684 + ... + 9705883.

It is an arithmetic number, because the mean of its divisors is an integer number (1403958752).

Almost surely, 2^21350523700 is an apocalyptic number.

21350523700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21350523700 is an abundant number, since it is smaller than the sum of its proper divisors (29191991372).

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

21350523700 is a wasteful number, since it uses less digits than its factorization.

21350523700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19409592 (or 19409585 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The spelling of 21350523700 in words is "twenty-one billion, three hundred fifty million, five hundred twenty-three thousand, seven hundred".