21610563052 has 12 divisors (see below), whose sum is σ = 40727599696. Its totient is φ = 9974106000.

The previous prime is 21610563043. The next prime is 21610563067. The reversal of 21610563052 is 25036501612.

It is an alternating number because its digits alternate between even and odd.

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, 207793824 + ... + 207793927.

Almost surely, 2^21610563052 is an apocalyptic number.

It is an amenable number.

21610563052 is a deficient number, since it is larger than the sum of its proper divisors (19117036644).

21610563052 is a wasteful number, since it uses less digits than its factorization.

21610563052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415587768 (or 415587766 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 21610563052 in words is "twenty-one billion, six hundred ten million, five hundred sixty-three thousand, fifty-two".