20473853 has 4 divisors (see below), whose sum is σ = 20565888. Its totient is φ = 20381820.

The previous prime is 20473823. The next prime is 20473867. The reversal of 20473853 is 35837402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20473853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473823) 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, 45683 + ... + 46128.

It is an arithmetic number, because the mean of its divisors is an integer number (5141472).

Almost surely, 2^20473853 is an apocalyptic number.

It is an amenable number.

20473853 is a deficient number, since it is larger than the sum of its proper divisors (92035).

20473853 is an equidigital number, since it uses as much as digits as its factorization.

20473853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92034.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 20473853 is about 4524.8041946586. The cubic root of 20473853 is about 273.5687757548.

The spelling of 20473853 in words is "twenty million, four hundred seventy-three thousand, eight hundred fifty-three".