20953319 has 8 divisors (see below), whose sum is σ = 21479040. Its totient is φ = 20433400.

The previous prime is 20953313. The next prime is 20953321. The reversal of 20953319 is 91335902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20953319 is a prime.

It is a super-2 number, since 2×20953319² = 878083154231522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20953313) 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 7 ways as a sum of consecutive naturals, for example, 6374 + ... + 9084.

It is an arithmetic number, because the mean of its divisors is an integer number (2684880).

Almost surely, 2^20953319 is an apocalyptic number.

20953319 is a deficient number, since it is larger than the sum of its proper divisors (525721).

20953319 is a wasteful number, since it uses less digits than its factorization.

20953319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 20953319 is about 4577.4795466501. The cubic root of 20953319 is about 275.6878384535.

The spelling of 20953319 in words is "twenty million, nine hundred fifty-three thousand, three hundred nineteen".