21031136332 has 12 divisors (see below), whose sum is σ = 37148456520. Its totient is φ = 10417291616.

The previous prime is 21031136327. The next prime is 21031136341. The reversal of 21031136332 is 23363113012.

It is a junction number, because it is equal to n+sod(n) for n = 21031136297 and 21031136306.

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 in 3 ways as a sum of consecutive naturals, for example, 24568657 + ... + 24569512.

It is an arithmetic number, because the mean of its divisors is an integer number (3095704710).

Almost surely, 2^21031136332 is an apocalyptic number.

It is an amenable number.

21031136332 is a deficient number, since it is larger than the sum of its proper divisors (16117320188).

21031136332 is a wasteful number, since it uses less digits than its factorization.

21031136332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49138280 (or 49138278 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21031136332 its reverse (23363113012), we get a palindrome (44394249344).

The spelling of 21031136332 in words is "twenty-one billion, thirty-one million, one hundred thirty-six thousand, three hundred thirty-two".