20670023 has 8 divisors (see below), whose sum is σ = 22858896. Its totient is φ = 18532800.

The previous prime is 20670007. The next prime is 20670047. The reversal of 20670023 is 32007602.

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

It is not a de Polignac number, because 20670023 - 2⁴ = 20670007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20669977 and 20670004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12068 + ... + 13673.

It is an arithmetic number, because the mean of its divisors is an integer number (2857362).

Almost surely, 2^20670023 is an apocalyptic number.

20670023 is a deficient number, since it is larger than the sum of its proper divisors (2188873).

20670023 is a wasteful number, since it uses less digits than its factorization.

20670023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25825.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20670023 is about 4546.4296981258. The cubic root of 20670023 is about 274.4397320473.

Adding to 20670023 its reverse (32007602), we get a palindrome (52677625).

The spelling of 20670023 in words is "twenty million, six hundred seventy thousand, twenty-three".