20915338850 has 288 divisors, whose sum is σ = 50270782464. Its totient is φ = 6425395200.

The previous prime is 20915338831. The next prime is 20915338957. The reversal of 20915338850 is 5883351902.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 125241467 + ... + 125241633.

It is an arithmetic number, because the mean of its divisors is an integer number (174551328).

Almost surely, 2^20915338850 is an apocalyptic number.

20915338850 is an abundant number, since it is smaller than the sum of its proper divisors (29355443614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20915338850 is a wasteful number, since it uses less digits than its factorization.

20915338850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 20915338850 in words is "twenty billion, nine hundred fifteen million, three hundred thirty-eight thousand, eight hundred fifty".