21040314100 has 54 divisors (see below), whose sum is σ = 49439797890. Its totient is φ = 7768725120.

The previous prime is 21040314083. The next prime is 21040314103. The reversal of 21040314100 is 141304012.

It can be written as a sum of positive squares in 9 ways, for example, as 6129950436 + 14910363664 = 78294^2 + 122108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21040314103) 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 17 ways as a sum of consecutive naturals, for example, 605595 + ... + 639394.

Almost surely, 2^21040314100 is an apocalyptic number.

21040314100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21040314100 is an abundant number, since it is smaller than the sum of its proper divisors (28399483790).

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

21040314100 is a wasteful number, since it uses less digits than its factorization.

21040314100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245029 (or 1245009 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21040314100 its reverse (141304012), we get a palindrome (21181618112).

The spelling of 21040314100 in words is "twenty-one billion, forty million, three hundred fourteen thousand, one hundred".