21103324232 has 8 divisors (see below), whose sum is σ = 39568732950. Its totient is φ = 10551662112.

The previous prime is 21103324223. The next prime is 21103324241. The reversal of 21103324232 is 23242330112.

It is an interprime number because it is at equal distance from previous prime (21103324223) and next prime (21103324241).

It can be written as a sum of positive squares in only one way, i.e., 11731922596 + 9371401636 = 108314^2 + 96806^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21103324198 and 21103324207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318957757 + ... + 1318957772.

Almost surely, 2^21103324232 is an apocalyptic number.

It is an amenable number.

21103324232 is a deficient number, since it is larger than the sum of its proper divisors (18465408718).

21103324232 is a wasteful number, since it uses less digits than its factorization.

21103324232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637915535 (or 2637915531 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21103324232 its reverse (23242330112), we get a palindrome (44345654344).

The spelling of 21103324232 in words is "twenty-one billion, one hundred three million, three hundred twenty-four thousand, two hundred thirty-two".