20953111 has 8 divisors (see below), whose sum is σ = 21361520. Its totient is φ = 20547648.

The previous prime is 20953087. The next prime is 20953123. The reversal of 20953111 is 11135902.

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 20953111 - 2⁷ = 20952983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20953151) 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, 17995 + ... + 19123.

It is an arithmetic number, because the mean of its divisors is an integer number (2670190).

Almost surely, 2^20953111 is an apocalyptic number.

20953111 is a deficient number, since it is larger than the sum of its proper divisors (408409).

20953111 is a wasteful number, since it uses less digits than its factorization.

20953111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 20953111 is about 4577.4568266670. The cubic root of 20953111 is about 275.6869262152.

The spelling of 20953111 in words is "twenty million, nine hundred fifty-three thousand, one hundred eleven".