20135755 has 4 divisors (see below), whose sum is σ = 24162912. Its totient is φ = 16108600.

The previous prime is 20135749. The next prime is 20135761. The reversal of 20135755 is 55753102.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20135749) and next prime (20135761).

It is not a de Polignac number, because 20135755 - 2¹⁷ = 20004683 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2013571 + ... + 2013580.

It is an arithmetic number, because the mean of its divisors is an integer number (6040728).

Almost surely, 2^20135755 is an apocalyptic number.

20135755 is a deficient number, since it is larger than the sum of its proper divisors (4027157).

20135755 is an equidigital number, since it uses as much as digits as its factorization.

20135755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027156.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 20135755 is about 4487.2881565596. The cubic root of 20135755 is about 272.0545368946.

Adding to 20135755 its reverse (55753102), we get a palindrome (75888857).

The spelling of 20135755 in words is "twenty million, one hundred thirty-five thousand, seven hundred fifty-five".