20956755 has 8 divisors (see below), whose sum is σ = 33530832. Its totient is φ = 11176928.

The previous prime is 20956739. The next prime is 20956759. The reversal of 20956755 is 55765902.

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 20956755 - 2⁴ = 20956739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20956759) 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, 698544 + ... + 698573.

It is an arithmetic number, because the mean of its divisors is an integer number (4191354).

Almost surely, 2^20956755 is an apocalyptic number.

20956755 is a deficient number, since it is larger than the sum of its proper divisors (12574077).

20956755 is a wasteful number, since it uses less digits than its factorization.

20956755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397125.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 20956755 is about 4577.8548469780. The cubic root of 20956755 is about 275.7029070549.

The spelling of 20956755 in words is "twenty million, nine hundred fifty-six thousand, seven hundred fifty-five".