21602016032 has 24 divisors (see below), whose sum is σ = 42545385036. Its totient is φ = 10796838912.

The previous prime is 21602015969. The next prime is 21602016043. The reversal of 21602016032 is 23061020612.

It can be written as a sum of positive squares in 2 ways, for example, as 21455218576 + 146797456 = 146476^2 + 12116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21602015989 and 21602016007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45233 + ... + 212720.

Almost surely, 2^21602016032 is an apocalyptic number.

It is an amenable number.

21602016032 is a deficient number, since it is larger than the sum of its proper divisors (20943369004).

21602016032 is a wasteful number, since it uses less digits than its factorization.

21602016032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260580 (or 260572 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21602016032 its reverse (23061020612), we get a palindrome (44663036644).

The spelling of 21602016032 in words is "twenty-one billion, six hundred two million, sixteen thousand, thirty-two".