20135992 has 32 divisors (see below), whose sum is σ = 39466800. Its totient is φ = 9621504.

The previous prime is 20135987. The next prime is 20135993. The reversal of 20135992 is 29953102.

It is a super-3 number, since 3×20135992³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16888 + ... + 18040.

Almost surely, 2^20135992 is an apocalyptic number.

It is an amenable number.

20135992 is a deficient number, since it is larger than the sum of its proper divisors (19330808).

20135992 is a wasteful number, since it uses less digits than its factorization.

20135992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255 (or 1251 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 20135992 is about 4487.3145644138. The cubic root of 20135992 is about 272.0556042608.

The spelling of 20135992 in words is "twenty million, one hundred thirty-five thousand, nine hundred ninety-two".