21161624150 has 24 divisors (see below), whose sum is σ = 39513799080. Its totient is φ = 8431708160.

The previous prime is 21161624117. The next prime is 21161624173. The reversal of 21161624150 is 5142616112.

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 11 ways as a sum of consecutive naturals, for example, 810560 + ... + 836259.

It is an arithmetic number, because the mean of its divisors is an integer number (1646408295).

Almost surely, 2^21161624150 is an apocalyptic number.

21161624150 is a deficient number, since it is larger than the sum of its proper divisors (18352174930).

21161624150 is a wasteful number, since it uses less digits than its factorization.

21161624150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647088 (or 1647083 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 21161624150 in words is "twenty-one billion, one hundred sixty-one million, six hundred twenty-four thousand, one hundred fifty".