21541619150 has 24 divisors (see below), whose sum is σ = 40141523784. Its totient is φ = 8600709600.

The previous prime is 21541619123. The next prime is 21541619153. The reversal of 21541619150 is 5191614512.

It is a self number, because there is not a number n which added to its sum of digits gives 21541619150.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21541619153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 371132 + ... + 425231.

It is an arithmetic number, because the mean of its divisors is an integer number (1672563491).

Almost surely, 2^21541619150 is an apocalyptic number.

21541619150 is a deficient number, since it is larger than the sum of its proper divisors (18599904634).

21541619150 is a wasteful number, since it uses less digits than its factorization.

21541619150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796916 (or 796911 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 21541619150 in words is "twenty-one billion, five hundred forty-one million, six hundred nineteen thousand, one hundred fifty".