20755911 has 16 divisors (see below), whose sum is σ = 30417408. Its totient is φ = 12484800.

The previous prime is 20755877. The next prime is 20755937. The reversal of 20755911 is 11955702.

It is not a de Polignac number, because 20755911 - 2⁷ = 20755783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20755951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2226 + ... + 6816.

It is an arithmetic number, because the mean of its divisors is an integer number (1901088).

Almost surely, 2^20755911 is an apocalyptic number.

20755911 is a deficient number, since it is larger than the sum of its proper divisors (9661497).

20755911 is a wasteful number, since it uses less digits than its factorization.

20755911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 20755911 is about 4555.8655599128. The cubic root of 20755911 is about 274.8193237451.

The spelling of 20755911 in words is "twenty million, seven hundred fifty-five thousand, nine hundred eleven".