20493253 has 8 divisors (see below), whose sum is σ = 23328576. Its totient is φ = 17820000.

The previous prime is 20493197. The next prime is 20493257. The reversal of 20493253 is 35239402.

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

It is not a de Polignac number, because 20493253 - 2⁹ = 20492741 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 (20493257) 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 7 ways as a sum of consecutive naturals, for example, 40248 + ... + 40753.

It is an arithmetic number, because the mean of its divisors is an integer number (2916072).

Almost surely, 2^20493253 is an apocalyptic number.

20493253 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20493253 is a deficient number, since it is larger than the sum of its proper divisors (2835323).

20493253 is a wasteful number, since it uses less digits than its factorization.

20493253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81035.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20493253 is about 4526.9474262465. The cubic root of 20493253 is about 273.6551551781.

It can be divided in two parts, 20493 and 253, that multiplied together give a square (5184729 = 2277²).

The spelling of 20493253 in words is "twenty million, four hundred ninety-three thousand, two hundred fifty-three".