20956011 has 8 divisors (see below), whose sum is σ = 27993744. Its totient is φ = 13944480.

The previous prime is 20956003. The next prime is 20956021. The reversal of 20956011 is 11065902.

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

It is not a de Polignac number, because 20956011 - 2³ = 20956003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20956021) 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, 4600 + ... + 7941.

It is an arithmetic number, because the mean of its divisors is an integer number (3499218).

Almost surely, 2^20956011 is an apocalyptic number.

20956011 is a deficient number, since it is larger than the sum of its proper divisors (7037733).

20956011 is a wasteful number, since it uses less digits than its factorization.

20956011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13101.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 20956011 is about 4577.7735854889. The cubic root of 20956011 is about 275.6996443776.

The spelling of 20956011 in words is "twenty million, nine hundred fifty-six thousand, eleven".