20392028 has 6 divisors (see below), whose sum is σ = 35686056. Its totient is φ = 10196012.

The previous prime is 20392013. The next prime is 20392037. The reversal of 20392028 is 82029302.

It is a junction number, because it is equal to n+sod(n) for n = 20391988 and 20392006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2549000 + ... + 2549007.

It is an arithmetic number, because the mean of its divisors is an integer number (5947676).

Almost surely, 2^20392028 is an apocalyptic number.

It is an amenable number.

20392028 is a deficient number, since it is larger than the sum of its proper divisors (15294028).

20392028 is a wasteful number, since it uses less digits than its factorization.

20392028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5098011 (or 5098009 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20392028 is about 4515.7533147859. The cubic root of 20392028 is about 273.2038444095.

The spelling of 20392028 in words is "twenty million, three hundred ninety-two thousand, twenty-eight".