20621020050 has 72 divisors (see below), whose sum is σ = 56447189604. Its totient is φ = 5395178880.

The previous prime is 20621020037. The next prime is 20621020051. The reversal of 20621020050 is 5002012602.

20621020050 is a `hidden beast` number, since 20 + 621 + 0 + 20 + 0 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 2640623769 + 17980396281 = 51387^2 + 134091^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20621020051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 408457 + ... + 456156.

Almost surely, 2^20621020050 is an apocalyptic number.

20621020050 is an abundant number, since it is smaller than the sum of its proper divisors (35826169554).

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

20621020050 is a wasteful number, since it uses less digits than its factorization.

20621020050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864684 (or 864676 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 20621020050 its reverse (5002012602), we get a palindrome (25623032652).

The spelling of 20621020050 in words is "twenty billion, six hundred twenty-one million, twenty thousand, fifty".