20143768 has 32 divisors (see below), whose sum is σ = 39916800. Its totient is φ = 9510688.

The previous prime is 20143733. The next prime is 20143787. The reversal of 20143768 is 86734102.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14613 + ... + 15931.

It is an arithmetic number, because the mean of its divisors is an integer number (1247400).

Almost surely, 2^20143768 is an apocalyptic number.

It is an amenable number.

20143768 is a deficient number, since it is larger than the sum of its proper divisors (19773032).

20143768 is a wasteful number, since it uses less digits than its factorization.

20143768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431 (or 1427 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20143768 is about 4488.1809232695. The cubic root of 20143768 is about 272.0906200362.

The spelling of 20143768 in words is "twenty million, one hundred forty-three thousand, seven hundred sixty-eight".