20439024 has 20 divisors (see below), whose sum is σ = 52800936. Its totient is φ = 6812992.

The previous prime is 20439017. The next prime is 20439043. The reversal of 20439024 is 42093402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20438985 and 20439003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212859 + ... + 212954.

Almost surely, 2^20439024 is an apocalyptic number.

20439024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20439024 is an abundant number, since it is smaller than the sum of its proper divisors (32361912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20439024 is a wasteful number, since it uses less digits than its factorization.

20439024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425824 (or 425818 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20439024 is about 4520.9538816493. The cubic root of 20439024 is about 273.4135609562.

The spelling of 20439024 in words is "twenty million, four hundred thirty-nine thousand, twenty-four".