21766150356 has 24 divisors (see below), whose sum is σ = 52026409344. Its totient is φ = 7078422720.

The previous prime is 21766150331. The next prime is 21766150363. The reversal of 21766150356 is 65305166712.

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, 22119580 + ... + 22120563.

It is an arithmetic number, because the mean of its divisors is an integer number (2167767056).

Almost surely, 2^21766150356 is an apocalyptic number.

It is an amenable number.

21766150356 is an abundant number, since it is smaller than the sum of its proper divisors (30260258988).

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

21766150356 is a wasteful number, since it uses less digits than its factorization.

21766150356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44240191 (or 44240189 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 21766150356 in words is "twenty-one billion, seven hundred sixty-six million, one hundred fifty thousand, three hundred fifty-six".