20023101 has 12 divisors (see below), whose sum is σ = 33054112. Its totient is φ = 11441736.

The previous prime is 20023063. The next prime is 20023121. The reversal of 20023101 is 10132002.

It is a happy number.

It is not a de Polignac number, because 20023101 - 2⁶ = 20023037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023121) 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 11 ways as a sum of consecutive naturals, for example, 158851 + ... + 158976.

Almost surely, 2^20023101 is an apocalyptic number.

20023101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20023101 is a deficient number, since it is larger than the sum of its proper divisors (13031011).

20023101 is a wasteful number, since it uses less digits than its factorization.

20023101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317840 (or 317837 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20023101 is about 4474.7179799402. The cubic root of 20023101 is about 271.5462310496.

Adding to 20023101 its reverse (10132002), we get a palindrome (30155103).

The spelling of 20023101 in words is "twenty million, twenty-three thousand, one hundred one".