20675263 has 4 divisors (see below), whose sum is σ = 23628880. Its totient is φ = 17721648.

The previous prime is 20675261. The next prime is 20675273. The reversal of 20675263 is 36257602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36257602 = 2 ⋅18128801.

It is not a de Polignac number, because 20675263 - 2¹ = 20675261 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 (20675261) 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, 1476798 + ... + 1476811.

It is an arithmetic number, because the mean of its divisors is an integer number (5907220).

Almost surely, 2^20675263 is an apocalyptic number.

20675263 is a deficient number, since it is larger than the sum of its proper divisors (2953617).

20675263 is an equidigital number, since it uses as much as digits as its factorization.

20675263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953616.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 20675263 is about 4547.0059379772. The cubic root of 20675263 is about 274.4629209054.

The spelling of 20675263 in words is "twenty million, six hundred seventy-five thousand, two hundred sixty-three".