21260532463432 has 8 divisors (see below), whose sum is σ = 39863498368950. Its totient is φ = 10630266231712.

The previous prime is 21260532463369. The next prime is 21260532463601. The reversal of 21260532463432 is 23436423506212.

It can be written as a sum of positive squares in only one way, i.e., 19386990200356 + 1873542263076 = 4403066^2 + 1368774^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328783278957 + ... + 1328783278972.

Almost surely, 2^{21260532463432} is an apocalyptic number.

It is an amenable number.

21260532463432 is a deficient number, since it is larger than the sum of its proper divisors (18602965905518).

21260532463432 is a wasteful number, since it uses less digits than its factorization.

21260532463432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657566557935 (or 2657566557931 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 43.

Adding to 21260532463432 its reverse (23436423506212), we get a palindrome (44696955969644).

The spelling of 21260532463432 in words is "twenty-one trillion, two hundred sixty billion, five hundred thirty-two million, four hundred sixty-three thousand, four hundred thirty-two".