20136340 has 24 divisors (see below), whose sum is σ = 48327552. Its totient is φ = 6903840.

The previous prime is 20136331. The next prime is 20136367. The reversal of 20136340 is 4363102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71776 + ... + 72055.

It is an arithmetic number, because the mean of its divisors is an integer number (2013648).

Almost surely, 2^20136340 is an apocalyptic number.

20136340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20136340 is an abundant number, since it is smaller than the sum of its proper divisors (28191212).

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

20136340 is a wasteful number, since it uses less digits than its factorization.

20136340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143847 (or 143845 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20136340 is about 4487.3533402218. The cubic root of 20136340 is about 272.0571715175.

Adding to 20136340 its reverse (4363102), we get a palindrome (24499442).

The spelling of 20136340 in words is "twenty million, one hundred thirty-six thousand, three hundred forty".