21114431300 has 18 divisors (see below), whose sum is σ = 45818316138. Its totient is φ = 8445772480.

The previous prime is 21114431291. The next prime is 21114431323. The reversal of 21114431300 is 313441112.

It can be written as a sum of positive squares in 3 ways, for example, as 376127236 + 20738304064 = 19394^2 + 144008^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105572057 + ... + 105572256.

Almost surely, 2^21114431300 is an apocalyptic number.

21114431300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21114431300 is an abundant number, since it is smaller than the sum of its proper divisors (24703884838).

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

21114431300 is a wasteful number, since it uses less digits than its factorization.

21114431300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211144327 (or 211144320 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21114431300 its reverse (313441112), we get a palindrome (21427872412).

The spelling of 21114431300 in words is "twenty-one billion, one hundred fourteen million, four hundred thirty-one thousand, three hundred".