20361646 has 8 divisors (see below), whose sum is σ = 31118904. Its totient is φ = 9988680.

The previous prime is 20361641. The next prime is 20361659. The reversal of 20361646 is 64616302.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20361641) 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, 95940 + ... + 96151.

It is an arithmetic number, because the mean of its divisors is an integer number (3889863).

Almost surely, 2^20361646 is an apocalyptic number.

20361646 is a deficient number, since it is larger than the sum of its proper divisors (10757258).

20361646 is a wasteful number, since it uses less digits than its factorization.

20361646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192146.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20361646 is about 4512.3880595534. The cubic root of 20361646 is about 273.0680952024.

Adding to 20361646 its reverse (64616302), we get a palindrome (84977948).

The spelling of 20361646 in words is "twenty million, three hundred sixty-one thousand, six hundred forty-six".