20023502 has 4 divisors (see below), whose sum is σ = 30035256. Its totient is φ = 10011750.

The previous prime is 20023469. The next prime is 20023513. The reversal of 20023502 is 20532002.

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

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 as a sum of consecutive naturals, namely, 5005874 + ... + 5005877.

It is an arithmetic number, because the mean of its divisors is an integer number (7508814).

Almost surely, 2^20023502 is an apocalyptic number.

20023502 is a deficient number, since it is larger than the sum of its proper divisors (10011754).

20023502 is a wasteful number, since it uses less digits than its factorization.

20023502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10011753.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20023502 is about 4474.7627870089. The cubic root of 20023502 is about 271.5480437777.

Adding to 20023502 its reverse (20532002), we get a palindrome (40555504).

The spelling of 20023502 in words is "twenty million, twenty-three thousand, five hundred two".