20380136 has 32 divisors (see below), whose sum is σ = 43824000. Its totient is φ = 8703936.

The previous prime is 20380123. The next prime is 20380169. The reversal of 20380136 is 63108302.

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, 24170 + ... + 24998.

It is an arithmetic number, because the mean of its divisors is an integer number (1369500).

Almost surely, 2^20380136 is an apocalyptic number.

It is an amenable number.

20380136 is an abundant number, since it is smaller than the sum of its proper divisors (23443864).

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

20380136 is a wasteful number, since it uses less digits than its factorization.

20380136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1277 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20380136 is about 4514.4363989318. The cubic root of 20380136 is about 273.1507260719.

Adding to 20380136 its reverse (63108302), we get a palindrome (83488438).

The spelling of 20380136 in words is "twenty million, three hundred eighty thousand, one hundred thirty-six".