20501020140 has 48 divisors (see below), whose sum is σ = 60424062720. Its totient is φ = 5179204800.

The previous prime is 20501020109. The next prime is 20501020151. The reversal of 20501020140 is 4102010502.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8990536 + ... + 8992815.

It is an arithmetic number, because the mean of its divisors is an integer number (1258834640).

Almost surely, 2^20501020140 is an apocalyptic number.

20501020140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20501020140 is an abundant number, since it is smaller than the sum of its proper divisors (39923042580).

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

20501020140 is a wasteful number, since it uses less digits than its factorization.

20501020140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17983382 (or 17983380 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 20501020140 its reverse (4102010502), we get a palindrome (24603030642).

The spelling of 20501020140 in words is "twenty billion, five hundred one million, twenty thousand, one hundred forty".