21305363100 has 144 divisors (see below), whose sum is σ = 74157753600. Its totient is φ = 4613483520.

The previous prime is 21305363083. The next prime is 21305363113. The reversal of 21305363100 is 136350312.

It is a happy number.

It is a super-2 number, since 2×21305363100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 227085 + ... + 306884.

It is an arithmetic number, because the mean of its divisors is an integer number (514984400).

Almost surely, 2^21305363100 is an apocalyptic number.

21305363100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21305363100 is an abundant number, since it is smaller than the sum of its proper divisors (52852390500).

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

21305363100 is a wasteful number, since it uses less digits than its factorization.

21305363100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534012 (or 534005 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

The spelling of 21305363100 in words is "twenty-one billion, three hundred five million, three hundred sixty-three thousand, one hundred".