20952311 has 4 divisors (see below), whose sum is σ = 21628224. Its totient is φ = 20276400.

The previous prime is 20952293. The next prime is 20952319. The reversal of 20952311 is 11325902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20952311 - 2⁶ = 20952247 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 (20952319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337910 + ... + 337971.

It is an arithmetic number, because the mean of its divisors is an integer number (5407056).

Almost surely, 2^20952311 is an apocalyptic number.

20952311 is a deficient number, since it is larger than the sum of its proper divisors (675913).

20952311 is an equidigital number, since it uses as much as digits as its factorization.

20952311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675912.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 20952311 is about 4577.3694410655. The cubic root of 20952311 is about 275.6834175501.

The spelling of 20952311 in words is "twenty million, nine hundred fifty-two thousand, three hundred eleven".