21315345055150 has 24 divisors (see below), whose sum is σ = 40296485116584. Its totient is φ = 8386365266400.

The previous prime is 21315345055133. The next prime is 21315345055157. The reversal of 21315345055150 is 5155054351312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21315345055157) 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, 3494315812 + ... + 3494321911.

It is an arithmetic number, because the mean of its divisors is an integer number (1679020213191).

Almost surely, 2^{21315345055150} is an apocalyptic number.

21315345055150 is a deficient number, since it is larger than the sum of its proper divisors (18981140061434).

21315345055150 is a wasteful number, since it uses less digits than its factorization.

21315345055150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6988637796 (or 6988637791 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 40.

The spelling of 21315345055150 in words is "twenty-one trillion, three hundred fifteen billion, three hundred forty-five million, fifty-five thousand, one hundred fifty".