20469928 has 16 divisors (see below), whose sum is σ = 38433780. Its totient is φ = 10220928.

The previous prime is 20469923. The next prime is 20469937. The reversal of 20469928 is 82996402.

It can be written as a sum of positive squares in 2 ways, for example, as 18679684 + 1790244 = 4322^2 + 1338^2 .

It is not an unprimeable number, because it can be changed into a prime (20469923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7026 + ... + 9502.

Almost surely, 2^20469928 is an apocalyptic number.

It is an amenable number.

20469928 is a deficient number, since it is larger than the sum of its proper divisors (17963852).

20469928 is a wasteful number, since it uses less digits than its factorization.

20469928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516 (or 3512 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 20469928 is about 4524.3704534443. The cubic root of 20469928 is about 273.5512928696.

The spelling of 20469928 in words is "twenty million, four hundred sixty-nine thousand, nine hundred twenty-eight".