20960155 has 8 divisors (see below), whose sum is σ = 25383600. Its totient is φ = 16613856.

The previous prime is 20960129. The next prime is 20960179. The reversal of 20960155 is 55106902.

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 20960155 - 2⁹ = 20959643 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18685 + ... + 19774.

It is an arithmetic number, because the mean of its divisors is an integer number (3172950).

Almost surely, 2^20960155 is an apocalyptic number.

20960155 is a deficient number, since it is larger than the sum of its proper divisors (4423445).

20960155 is a wasteful number, since it uses less digits than its factorization.

20960155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38573.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 20960155 is about 4578.2261848886. The cubic root of 20960155 is about 275.7178161570.

It can be divided in two parts, 20960 and 155, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20960155 in words is "twenty million, nine hundred sixty thousand, one hundred fifty-five".