20389430 has 8 divisors (see below), whose sum is σ = 36700992. Its totient is φ = 8155768.

The previous prime is 20389417. The next prime is 20389459. The reversal of 20389430 is 3498302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20389393 and 20389402.

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, 1019462 + ... + 1019481.

It is an arithmetic number, because the mean of its divisors is an integer number (4587624).

Almost surely, 2^20389430 is an apocalyptic number.

20389430 is a deficient number, since it is larger than the sum of its proper divisors (16311562).

20389430 is a wasteful number, since it uses less digits than its factorization.

20389430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038950.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20389430 is about 4515.4656459772. The cubic root of 20389430 is about 273.1922416117.

The spelling of 20389430 in words is "twenty million, three hundred eighty-nine thousand, four hundred thirty".