20142372 has 12 divisors (see below), whose sum is σ = 46998896. Its totient is φ = 6714120.

The previous prime is 20142359. The next prime is 20142377. The reversal of 20142372 is 27324102.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20142377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839254 + ... + 839277.

Almost surely, 2^20142372 is an apocalyptic number.

It is an amenable number.

20142372 is an abundant number, since it is smaller than the sum of its proper divisors (26856524).

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

20142372 is a wasteful number, since it uses less digits than its factorization.

20142372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678538 (or 1678536 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20142372 is about 4488.0254009976. The cubic root of 20142372 is about 272.0843344316.

Adding to 20142372 its reverse (27324102), we get a palindrome (47466474).

The spelling of 20142372 in words is "twenty million, one hundred forty-two thousand, three hundred seventy-two".