21356150055642 has 24 divisors (see below), whose sum is σ = 46278858278016. Its totient is φ = 7117609019976.

The previous prime is 21356150055619. The next prime is 21356150055707. The reversal of 21356150055642 is 24655005165312.

21356150055642 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 6 + 1 + 50 + 0 + 556 + 42 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92186538 + ... + 92417909.

It is an arithmetic number, because the mean of its divisors is an integer number (1928285761584).

Almost surely, 2^{21356150055642} is an apocalyptic number.

21356150055642 is an abundant number, since it is smaller than the sum of its proper divisors (24922708222374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21356150055642 is a wasteful number, since it uses less digits than its factorization.

21356150055642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184610882 (or 184610879 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 21356150055642 in words is "twenty-one trillion, three hundred fifty-six billion, one hundred fifty million, fifty-five thousand, six hundred forty-two".