21035332532 has 6 divisors (see below), whose sum is σ = 36811831938. Its totient is φ = 10517666264.

The previous prime is 21035332511. The next prime is 21035332541. The reversal of 21035332532 is 23523353012.

It can be written as a sum of positive squares in only one way, i.e., 19623527056 + 1411805476 = 140084^2 + 37574^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21035332495 and 21035332504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2629416563 + ... + 2629416570.

It is an arithmetic number, because the mean of its divisors is an integer number (6135305323).

Almost surely, 2^21035332532 is an apocalyptic number.

It is an amenable number.

21035332532 is a deficient number, since it is larger than the sum of its proper divisors (15776499406).

21035332532 is a wasteful number, since it uses less digits than its factorization.

21035332532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258833137 (or 5258833135 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 29.

Adding to 21035332532 its reverse (23523353012), we get a palindrome (44558685544).

The spelling of 21035332532 in words is "twenty-one billion, thirty-five million, three hundred thirty-two thousand, five hundred thirty-two".