20023601 has 8 divisors (see below), whose sum is σ = 22307880. Its totient is φ = 17845632.

The previous prime is 20023589. The next prime is 20023609. The reversal of 20023601 is 10632002.

20023601 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 4 ways, for example, as 874225 + 19149376 = 935^2 + 4376^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20023601 - 2⁶ = 20023537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26180 + ... + 26933.

It is an arithmetic number, because the mean of its divisors is an integer number (2788485).

Almost surely, 2^20023601 is an apocalyptic number.

It is an amenable number.

20023601 is a deficient number, since it is larger than the sum of its proper divisors (2284279).

20023601 is a wasteful number, since it uses less digits than its factorization.

20023601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53155.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20023601 is about 4474.7738490342. The cubic root of 20023601 is about 271.5484913053.

Adding to 20023601 its reverse (10632002), we get a palindrome (30655603).

The spelling of 20023601 in words is "twenty million, twenty-three thousand, six hundred one".