21351550300 has 36 divisors (see below), whose sum is σ = 46391171400. Its totient is φ = 8529872320.

The previous prime is 21351550289. The next prime is 21351550301. The reversal of 21351550300 is 305515312.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21351550301) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 54250 + ... + 213649.

It is an arithmetic number, because the mean of its divisors is an integer number (1288643650).

Almost surely, 2^21351550300 is an apocalyptic number.

21351550300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21351550300 is an abundant number, since it is smaller than the sum of its proper divisors (25039621100).

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

21351550300 is a wasteful number, since it uses less digits than its factorization.

21351550300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268710 (or 268703 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The spelling of 21351550300 in words is "twenty-one billion, three hundred fifty-one million, five hundred fifty thousand, three hundred".