20953323 has 20 divisors (see below), whose sum is σ = 31508400. Its totient is φ = 13876272.

The previous prime is 20953321. The next prime is 20953351. The reversal of 20953323 is 32335902.

It is not a de Polignac number, because 20953323 - 2¹ = 20953321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20953321) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 12753 + ... + 14301.

It is an arithmetic number, because the mean of its divisors is an integer number (1575420).

Almost surely, 2^20953323 is an apocalyptic number.

20953323 is a deficient number, since it is larger than the sum of its proper divisors (10555077).

20953323 is a wasteful number, since it uses less digits than its factorization.

20953323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728 (or 1719 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 20953323 is about 4577.4799835717. The cubic root of 20953323 is about 275.6878559965.

The spelling of 20953323 in words is "twenty million, nine hundred fifty-three thousand, three hundred twenty-three".