20091755 has 8 divisors (see below), whose sum is σ = 24284400. Its totient is φ = 15957216.

The previous prime is 20091749. The next prime is 20091769. The reversal of 20091755 is 55719002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20091755 - 2⁶ = 20091691 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13760 + ... + 15149.

It is an arithmetic number, because the mean of its divisors is an integer number (3035550).

Almost surely, 2^20091755 is an apocalyptic number.

20091755 is a deficient number, since it is larger than the sum of its proper divisors (4192645).

20091755 is a wasteful number, since it uses less digits than its factorization.

20091755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29053.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 20091755 is about 4482.3827368934. The cubic root of 20091755 is about 271.8562307913.

The spelling of 20091755 in words is "twenty million, ninety-one thousand, seven hundred fifty-five".