20428376 has 8 divisors (see below), whose sum is σ = 38303220. Its totient is φ = 10214184.

The previous prime is 20428319. The next prime is 20428379. The reversal of 20428376 is 67382402.

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 (20428379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276766 + ... + 1276781.

Almost surely, 2^20428376 is an apocalyptic number.

It is an amenable number.

20428376 is a deficient number, since it is larger than the sum of its proper divisors (17874844).

20428376 is a wasteful number, since it uses less digits than its factorization.

20428376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553553 (or 2553549 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20428376 is about 4519.7761006492. The cubic root of 20428376 is about 273.3660731488.

The spelling of 20428376 in words is "twenty million, four hundred twenty-eight thousand, three hundred seventy-six".