20136312 has 48 divisors (see below), whose sum is σ = 62328240. Its totient is φ = 5753088.

The previous prime is 20136301. The next prime is 20136331. The reversal of 20136312 is 21363102.

20136312 is a `hidden beast` number, since 20 + 13 + 631 + 2 = 666.

It is a super-2 number, since 2×20136312² = 810942121922688, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 19473 + ... + 20480.

It is an arithmetic number, because the mean of its divisors is an integer number (1298505).

Almost surely, 2^20136312 is an apocalyptic number.

It is an amenable number.

20136312 is an abundant number, since it is smaller than the sum of its proper divisors (42191928).

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

20136312 is a wasteful number, since it uses less digits than its factorization.

20136312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39972 (or 39965 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20136312 is about 4487.3502203416. The cubic root of 20136312 is about 272.0570454170.

Adding to 20136312 its reverse (21363102), we get a palindrome (41499414).

The spelling of 20136312 in words is "twenty million, one hundred thirty-six thousand, three hundred twelve".