20137140 has 96 divisors (see below), whose sum is σ = 63504000. Its totient is φ = 5296896.

The previous prime is 20137111. The next prime is 20137153. The reversal of 20137140 is 4173102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47851 + ... + 48269.

It is an arithmetic number, because the mean of its divisors is an integer number (661500).

Almost surely, 2^20137140 is an apocalyptic number.

20137140 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 20137140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31752000).

20137140 is an abundant number, since it is smaller than the sum of its proper divisors (43366860).

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

20137140 is a wasteful number, since it uses less digits than its factorization.

20137140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20137140 is about 4487.4424787400. The cubic root of 20137140 is about 272.0607743380.

The spelling of 20137140 in words is "twenty million, one hundred thirty-seven thousand, one hundred forty".