20109124950 has 48 divisors (see below), whose sum is σ = 51479371776. Its totient is φ = 5189450400.

The previous prime is 20109124949. The next prime is 20109124957. The reversal of 20109124950 is 5942190102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20109124957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2157622 + ... + 2166921.

It is an arithmetic number, because the mean of its divisors is an integer number (1072486912).

Almost surely, 2^20109124950 is an apocalyptic number.

20109124950 is an abundant number, since it is smaller than the sum of its proper divisors (31370246826).

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

20109124950 is a wasteful number, since it uses less digits than its factorization.

20109124950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324589 (or 4324584 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The spelling of 20109124950 in words is "twenty billion, one hundred nine million, one hundred twenty-four thousand, nine hundred fifty".