20361642 has 32 divisors (see below), whose sum is σ = 46835712. Its totient is φ = 5780784.

The previous prime is 20361641. The next prime is 20361659. The reversal of 20361642 is 24616302.

It is not an unprimeable number, because it can be changed into a prime (20361641) 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 15 ways as a sum of consecutive naturals, for example, 5563 + ... + 8465.

It is an arithmetic number, because the mean of its divisors is an integer number (1463616).

Almost surely, 2^20361642 is an apocalyptic number.

20361642 is an abundant number, since it is smaller than the sum of its proper divisors (26474070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20361642 is a wasteful number, since it uses less digits than its factorization.

20361642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20361642 is about 4512.3876163291. The cubic root of 20361642 is about 273.0680773212.

Adding to 20361642 its reverse (24616302), we get a palindrome (44977944).

The spelling of 20361642 in words is "twenty million, three hundred sixty-one thousand, six hundred forty-two".