20137040 has 120 divisors (see below), whose sum is σ = 59540832. Its totient is φ = 6263040.

The previous prime is 20137003. The next prime is 20137043. The reversal of 20137040 is 4073102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20137043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42887 + ... + 43353.

Almost surely, 2^20137040 is an apocalyptic number.

20137040 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 20137040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29770416).

20137040 is an abundant number, since it is smaller than the sum of its proper divisors (39403792).

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

20137040 is a wasteful number, since it uses less digits than its factorization.

20137040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20137040 is about 4487.4313365220. The cubic root of 20137040 is about 272.0603239906.

The spelling of 20137040 in words is "twenty million, one hundred thirty-seven thousand, forty".