20143672 has 8 divisors (see below), whose sum is σ = 37769400. Its totient is φ = 10071832.

The previous prime is 20143663. The next prime is 20143679. The reversal of 20143672 is 27634102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143679) 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 as a sum of consecutive naturals, namely, 1258972 + ... + 1258987.

It is an arithmetic number, because the mean of its divisors is an integer number (4721175).

Almost surely, 2^20143672 is an apocalyptic number.

It is an amenable number.

20143672 is a deficient number, since it is larger than the sum of its proper divisors (17625728).

20143672 is a wasteful number, since it uses less digits than its factorization.

20143672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517965 (or 2517961 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20143672 is about 4488.1702285007. The cubic root of 20143672 is about 272.0901877976.

Adding to 20143672 its reverse (27634102), we get a palindrome (47777774).

The spelling of 20143672 in words is "twenty million, one hundred forty-three thousand, six hundred seventy-two".