21384938150 has 24 divisors (see below), whose sum is σ = 39824158680. Its totient is φ = 8543615360.

The previous prime is 21384938123. The next prime is 21384938189. The reversal of 21384938150 is 5183948312.

It is a Curzon number.

It is a congruent number.

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, 217235 + ... + 299934.

It is an arithmetic number, because the mean of its divisors is an integer number (1659339945).

Almost surely, 2^21384938150 is an apocalyptic number.

21384938150 is a deficient number, since it is larger than the sum of its proper divisors (18439220530).

21384938150 is a wasteful number, since it uses less digits than its factorization.

21384938150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518008 (or 518003 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 21384938150 in words is "twenty-one billion, three hundred eighty-four million, nine hundred thirty-eight thousand, one hundred fifty".