20102002140 has 192 divisors, whose sum is σ = 62030707200. Its totient is φ = 4823669760.

The previous prime is 20102002079. The next prime is 20102002169. The reversal of 20102002140 is 4120020102.

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 63 ways as a sum of consecutive naturals, for example, 45376759 + ... + 45377201.

It is an arithmetic number, because the mean of its divisors is an integer number (323076600).

Almost surely, 2^20102002140 is an apocalyptic number.

20102002140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20102002140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31015353600).

20102002140 is an abundant number, since it is smaller than the sum of its proper divisors (41928705060).

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

20102002140 is a wasteful number, since it uses less digits than its factorization.

20102002140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012 (or 1010 counting only the distinct ones).

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

Adding to 20102002140 its reverse (4120020102), we get a palindrome (24222022242).

The spelling of 20102002140 in words is "twenty billion, one hundred two million, two thousand, one hundred forty".