21140430100 has 36 divisors (see below), whose sum is σ = 46295626300. Its totient is φ = 8378588160.

The previous prime is 21140430061. The next prime is 21140430119. The reversal of 21140430100 is 103404112.

It can be written as a sum of positive squares in 6 ways, for example, as 1054171024 + 20086259076 = 32468^2 + 141726^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 958845 + ... + 980644.

Almost surely, 2^21140430100 is an apocalyptic number.

21140430100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21140430100 is an abundant number, since it is smaller than the sum of its proper divisors (25155196200).

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

21140430100 is a wasteful number, since it uses less digits than its factorization.

21140430100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939612 (or 1939605 counting only the distinct ones).

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

Adding to 21140430100 its reverse (103404112), we get a palindrome (21243834212).

The spelling of 21140430100 in words is "twenty-one billion, one hundred forty million, four hundred thirty thousand, one hundred".