20701223 has 4 divisors (see below), whose sum is σ = 21918960. Its totient is φ = 19483488.

The previous prime is 20701207. The next prime is 20701229. The reversal of 20701223 is 32210702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20701223 - 2⁴ = 20701207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1217719 = 20701223 / (2 + 0 + 7 + 0 + 1 + 2 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20701229) 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 3 ways as a sum of consecutive naturals, for example, 608843 + ... + 608876.

It is an arithmetic number, because the mean of its divisors is an integer number (5479740).

Almost surely, 2^20701223 is an apocalyptic number.

20701223 is a deficient number, since it is larger than the sum of its proper divisors (1217737).

20701223 is a wasteful number, since it uses less digits than its factorization.

20701223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217736.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20701223 is about 4549.8596681656. The cubic root of 20701223 is about 274.5777453603.

Adding to 20701223 its reverse (32210702), we get a palindrome (52911925).

The spelling of 20701223 in words is "twenty million, seven hundred one thousand, two hundred twenty-three".