21791392150 has 36 divisors (see below), whose sum is σ = 44551703196. Its totient is φ = 7924140400.

The previous prime is 21791392141. The next prime is 21791392169. The reversal of 21791392150 is 5129319712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1794892 + ... + 1806991.

It is an arithmetic number, because the mean of its divisors is an integer number (1237547311).

Almost surely, 2^21791392150 is an apocalyptic number.

21791392150 is an abundant number, since it is smaller than the sum of its proper divisors (22760311046).

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

21791392150 is a wasteful number, since it uses less digits than its factorization.

21791392150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601917 (or 3601901 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 21791392150 in words is "twenty-one billion, seven hundred ninety-one million, three hundred ninety-two thousand, one hundred fifty".