20001022140 has 48 divisors (see below), whose sum is σ = 61094033280. Its totient is φ = 4848732480.

The previous prime is 20001022123. The next prime is 20001022159. The reversal of 20001022140 is 4122010002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 15151630 + ... + 15152949.

It is an arithmetic number, because the mean of its divisors is an integer number (1272792360).

Almost surely, 2^20001022140 is an apocalyptic number.

20001022140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001022140 is an abundant number, since it is smaller than the sum of its proper divisors (41093011140).

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

20001022140 is a wasteful number, since it uses less digits than its factorization.

20001022140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30304602 (or 30304600 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20001022140 its reverse (4122010002), we get a palindrome (24123032142).

The spelling of 20001022140 in words is "twenty billion, one million, twenty-two thousand, one hundred forty".