20137400 has 48 divisors (see below), whose sum is σ = 47307240. Its totient is φ = 7971200.

The previous prime is 20137399. The next prime is 20137409. The reversal of 20137400 is 473102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20137409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20930 + ... + 21870.

Almost surely, 2^20137400 is an apocalyptic number.

20137400 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 20137400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23653620).

20137400 is an abundant number, since it is smaller than the sum of its proper divisors (27169840).

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

20137400 is a wasteful number, since it uses less digits than its factorization.

20137400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1055 counting only the distinct ones).

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

The square root of 20137400 is about 4487.4714483771. The cubic root of 20137400 is about 272.0619452341.

The spelling of 20137400 in words is "twenty million, one hundred thirty-seven thousand, four hundred".