20023495 has 4 divisors (see below), whose sum is σ = 24028200. Its totient is φ = 16018792.

The previous prime is 20023469. The next prime is 20023513. The reversal of 20023495 is 59432002.

It is a happy number.

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 20023495 - 2⁵ = 20023463 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2002345 + ... + 2002354.

It is an arithmetic number, because the mean of its divisors is an integer number (6007050).

Almost surely, 2^20023495 is an apocalyptic number.

20023495 is a deficient number, since it is larger than the sum of its proper divisors (4004705).

20023495 is an equidigital number, since it uses as much as digits as its factorization.

20023495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004704.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20023495 is about 4474.7620048445. The cubic root of 20023495 is about 271.5480121343.

Adding to 20023495 its reverse (59432002), we get a palindrome (79455497).

The spelling of 20023495 in words is "twenty million, twenty-three thousand, four hundred ninety-five".