20423101 has 4 divisors (see below), whose sum is σ = 20433600. Its totient is φ = 20412604.

The previous prime is 20423087. The next prime is 20423129. The reversal of 20423101 is 10132402.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20423101 - 2¹⁵ = 20390333 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 (20423201) 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, 1381 + ... + 6538.

It is an arithmetic number, because the mean of its divisors is an integer number (5108400).

Almost surely, 2^20423101 is an apocalyptic number.

It is an amenable number.

20423101 is a deficient number, since it is larger than the sum of its proper divisors (10499).

20423101 is an equidigital number, since it uses as much as digits as its factorization.

20423101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10498.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20423101 is about 4519.1925163684. The cubic root of 20423101 is about 273.3425416621.

Adding to 20423101 its reverse (10132402), we get a palindrome (30555503).

The spelling of 20423101 in words is "twenty million, four hundred twenty-three thousand, one hundred one".