19953213 has 32 divisors (see below), whose sum is σ = 32102400. Its totient is φ = 10777536.

The previous prime is 19953187. The next prime is 19953217. The reversal of 19953213 is 31235991.

It is not a de Polignac number, because 19953213 - 2⁶ = 19953149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19953217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52458 + ... + 52836.

It is an arithmetic number, because the mean of its divisors is an integer number (1003200).

Almost surely, 2^19953213 is an apocalyptic number.

It is an amenable number.

19953213 is a deficient number, since it is larger than the sum of its proper divisors (12149187).

19953213 is a wasteful number, since it uses less digits than its factorization.

19953213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521.

The product of its digits is 7290, while the sum is 33.

The square root of 19953213 is about 4466.9019465397. The cubic root of 19953213 is about 271.2299306295.

The spelling of 19953213 in words is "nineteen million, nine hundred fifty-three thousand, two hundred thirteen".