20461601 has 4 divisors (see below), whose sum is σ = 20470704. Its totient is φ = 20452500.

The previous prime is 20461579. The next prime is 20461603. The reversal of 20461601 is 10616402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20461601 - 2¹⁰ = 20460577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20461603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526 + ... + 6576.

It is an arithmetic number, because the mean of its divisors is an integer number (5117676).

Almost surely, 2^20461601 is an apocalyptic number.

It is an amenable number.

20461601 is a deficient number, since it is larger than the sum of its proper divisors (9103).

20461601 is an equidigital number, since it uses as much as digits as its factorization.

20461601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9102.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20461601 is about 4523.4501213123. The cubic root of 20461601 is about 273.5141950261.

The spelling of 20461601 in words is "twenty million, four hundred sixty-one thousand, six hundred one".