21102434132 has 24 divisors (see below), whose sum is σ = 41863130400. Its totient is φ = 9226974816.

The previous prime is 21102434039. The next prime is 21102434137. The reversal of 21102434132 is 23143420112.

It is a junction number, because it is equal to n+sod(n) for n = 21102434098 and 21102434107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102434137) 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 7 ways as a sum of consecutive naturals, for example, 10678382 + ... + 10680357.

It is an arithmetic number, because the mean of its divisors is an integer number (1744297100).

Almost surely, 2^21102434132 is an apocalyptic number.

It is an amenable number.

21102434132 is a deficient number, since it is larger than the sum of its proper divisors (20760696268).

21102434132 is a wasteful number, since it uses less digits than its factorization.

21102434132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21358775 (or 21358773 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21102434132 its reverse (23143420112), we get a palindrome (44245854244).

The spelling of 21102434132 in words is "twenty-one billion, one hundred two million, four hundred thirty-four thousand, one hundred thirty-two".