20434928 has 20 divisors (see below), whose sum is σ = 39786888. Its totient is φ = 10167360.

The previous prime is 20434913. The next prime is 20434951. The reversal of 20434928 is 82943402.

It is a junction number, because it is equal to n+sod(n) for n = 20434894 and 20434903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350 + ... + 6402.

Almost surely, 2^20434928 is an apocalyptic number.

It is an amenable number.

20434928 is a deficient number, since it is larger than the sum of its proper divisors (19351960).

20434928 is a wasteful number, since it uses less digits than its factorization.

20434928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6272 (or 6266 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20434928 is about 4520.5008572060. The cubic root of 20434928 is about 273.3952956228.

The spelling of 20434928 in words is "twenty million, four hundred thirty-four thousand, nine hundred twenty-eight".