20202140 has 48 divisors (see below), whose sum is σ = 48952512. Its totient is φ = 6859776.

The previous prime is 20202113. The next prime is 20202167. The reversal of 20202140 is 4120202.

It is an interprime number because it is at equal distance from previous prime (20202113) and next prime (20202167).

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, 15182 + ... + 16458.

It is an arithmetic number, because the mean of its divisors is an integer number (1019844).

Almost surely, 2^20202140 is an apocalyptic number.

20202140 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 20202140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24476256).

20202140 is an abundant number, since it is smaller than the sum of its proper divisors (28750372).

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

20202140 is a wasteful number, since it uses less digits than its factorization.

20202140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20202140 is about 4494.6790764191. The cubic root of 20202140 is about 272.3531852304.

Adding to 20202140 its reverse (4120202), we get a palindrome (24322342).

The spelling of 20202140 in words is "twenty million, two hundred two thousand, one hundred forty".