20135312 has 10 divisors (see below), whose sum is σ = 39012198. Its totient is φ = 10067648.

The previous prime is 20135267. The next prime is 20135321. The reversal of 20135312 is 21353102.

It can be written as a sum of positive squares in only one way, i.e., 11397376 + 8737936 = 3376^2 + 2956^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629213 + ... + 629244.

Almost surely, 2^20135312 is an apocalyptic number.

It is an amenable number.

20135312 is a deficient number, since it is larger than the sum of its proper divisors (18876886).

20135312 is a wasteful number, since it uses less digits than its factorization.

20135312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258465 (or 1258459 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20135312 is about 4487.2387946264. The cubic root of 20135312 is about 272.0525417531.

Adding to 20135312 its reverse (21353102), we get a palindrome (41488414).

The spelling of 20135312 in words is "twenty million, one hundred thirty-five thousand, three hundred twelve".