21203061532 has 6 divisors (see below), whose sum is σ = 37105357688. Its totient is φ = 10601530764.

The previous prime is 21203061491. The next prime is 21203061541. The reversal of 21203061532 is 23516030212.

It is a junction number, because it is equal to n+sod(n) for n = 21203061497 and 21203061506.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2650382688 + ... + 2650382695.

Almost surely, 2^21203061532 is an apocalyptic number.

It is an amenable number.

21203061532 is a deficient number, since it is larger than the sum of its proper divisors (15902296156).

21203061532 is a wasteful number, since it uses less digits than its factorization.

21203061532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5300765387 (or 5300765385 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21203061532 its reverse (23516030212), we get a palindrome (44719091744).

The spelling of 21203061532 in words is "twenty-one billion, two hundred three million, sixty-one thousand, five hundred thirty-two".