20153601 has 24 divisors (see below), whose sum is σ = 31512936. Its totient is φ = 12337920.

The previous prime is 20153599. The next prime is 20153657. The reversal of 20153601 is 10635102.

It can be written as a sum of positive squares in 4 ways, for example, as 119025 + 20034576 = 345^2 + 4476^2 .

It is not a de Polignac number, because 20153601 - 2¹ = 20153599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20153101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32571 + ... + 33183.

It is an arithmetic number, because the mean of its divisors is an integer number (1313039).

Almost surely, 2^20153601 is an apocalyptic number.

It is an amenable number.

20153601 is a deficient number, since it is larger than the sum of its proper divisors (11359335).

20153601 is a wasteful number, since it uses less digits than its factorization.

20153601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20153601 is about 4489.2762222880. The cubic root of 20153601 is about 272.1348857010.

Adding to 20153601 its reverse (10635102), we get a palindrome (30788703).

The spelling of 20153601 in words is "twenty million, one hundred fifty-three thousand, six hundred one".