21553104011650 has 48 divisors (see below), whose sum is σ = 42417355428000. Its totient is φ = 8125173365760.

The previous prime is 21553104011633. The next prime is 21553104011711. The reversal of 21553104011650 is 5611040135512.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58592500 + ... + 58959199.

It is an arithmetic number, because the mean of its divisors is an integer number (883694904750).

Almost surely, 2^{21553104011650} is an apocalyptic number.

21553104011650 is a deficient number, since it is larger than the sum of its proper divisors (20864251416350).

21553104011650 is a wasteful number, since it uses less digits than its factorization.

21553104011650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117551923 (or 117551918 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 21553104011650 in words is "twenty-one trillion, five hundred fifty-three billion, one hundred four million, eleven thousand, six hundred fifty".