21286116532 has 6 divisors (see below), whose sum is σ = 37250703938. Its totient is φ = 10643058264.

The previous prime is 21286116491. The next prime is 21286116547. The reversal of 21286116532 is 23561168212.

It can be written as a sum of positive squares in only one way, i.e., 15656015376 + 5630101156 = 125124^2 + 75034^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21286116491 and 21286116500.

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, 2660764563 + ... + 2660764570.

Almost surely, 2^21286116532 is an apocalyptic number.

It is an amenable number.

21286116532 is a deficient number, since it is larger than the sum of its proper divisors (15964587406).

21286116532 is a wasteful number, since it uses less digits than its factorization.

21286116532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321529137 (or 5321529135 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The spelling of 21286116532 in words is "twenty-one billion, two hundred eighty-six million, one hundred sixteen thousand, five hundred thirty-two".