21532631326 has 16 divisors (see below), whose sum is σ = 33917930784. Its totient is φ = 10232617824.

The previous prime is 21532631317. The next prime is 21532631347. The reversal of 21532631326 is 62313623512.

It is a junction number, because it is equal to n+sod(n) for n = 21532631291 and 21532631300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1483545 + ... + 1497988.

It is an arithmetic number, because the mean of its divisors is an integer number (2119870674).

Almost surely, 2^21532631326 is an apocalyptic number.

21532631326 is a deficient number, since it is larger than the sum of its proper divisors (12385299458).

21532631326 is a wasteful number, since it uses less digits than its factorization.

21532631326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981715.

The product of its digits is 38880, while the sum is 34.

The spelling of 21532631326 in words is "twenty-one billion, five hundred thirty-two million, six hundred thirty-one thousand, three hundred twenty-six".