20445000140 has 24 divisors (see below), whose sum is σ = 43981684992. Its totient is φ = 7978536320.

The previous prime is 20445000137. The next prime is 20445000197. The reversal of 20445000140 is 4100054402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12465644 + ... + 12467283.

It is an arithmetic number, because the mean of its divisors is an integer number (1832570208).

Almost surely, 2^20445000140 is an apocalyptic number.

20445000140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20445000140 is an abundant number, since it is smaller than the sum of its proper divisors (23536684852).

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

20445000140 is a wasteful number, since it uses less digits than its factorization.

20445000140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24932977 (or 24932975 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 20445000140 its reverse (4100054402), we get a palindrome (24545054542).

The spelling of 20445000140 in words is "twenty billion, four hundred forty-five million, one hundred forty", and thus it is an aban number.