20107140 has 48 divisors (see below), whose sum is σ = 57371328. Its totient is φ = 5259904.

The previous prime is 20107133. The next prime is 20107151. The reversal of 20107140 is 4170102.

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, 19 + ... + 6341.

It is an arithmetic number, because the mean of its divisors is an integer number (1195236).

Almost surely, 2^20107140 is an apocalyptic number.

20107140 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 20107140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28685664).

20107140 is an abundant number, since it is smaller than the sum of its proper divisors (37264188).

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

20107140 is a wasteful number, since it uses less digits than its factorization.

20107140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6388 (or 6386 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 20107140 is about 4484.0985716195. The cubic root of 20107140 is about 271.9256032113.

Adding to 20107140 its reverse (4170102), we get a palindrome (24277242).

The spelling of 20107140 in words is "twenty million, one hundred seven thousand, one hundred forty".