20657988050 has 48 divisors (see below), whose sum is σ = 43938884160. Its totient is φ = 7078560960.

The previous prime is 20657987969. The next prime is 20657988059. The reversal of 20657988050 is 5088975602.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a self number, because there is not a number n which added to its sum of digits gives 20657988050.

It is not an unprimeable number, because it can be changed into a prime (20657988059) 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, 608936 + ... + 641964.

It is an arithmetic number, because the mean of its divisors is an integer number (915393420).

Almost surely, 2^20657988050 is an apocalyptic number.

20657988050 is an abundant number, since it is smaller than the sum of its proper divisors (23280896110).

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

20657988050 is a wasteful number, since it uses less digits than its factorization.

20657988050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34835 (or 34830 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 20657988050 in words is "twenty billion, six hundred fifty-seven million, nine hundred eighty-eight thousand, fifty".