21541694150 has 36 divisors (see below), whose sum is σ = 41179856508. Its totient is φ = 8383767840.

The previous prime is 21541694101. The next prime is 21541694197. The reversal of 21541694150 is 5149614512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 88904 + ... + 225803.

It is an arithmetic number, because the mean of its divisors is an integer number (1143884903).

Almost surely, 2^21541694150 is an apocalyptic number.

21541694150 is a deficient number, since it is larger than the sum of its proper divisors (19638162358).

21541694150 is a wasteful number, since it uses less digits than its factorization.

21541694150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314793 (or 314751 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 21541694150 in words is "twenty-one billion, five hundred forty-one million, six hundred ninety-four thousand, one hundred fifty".