20439446 has 8 divisors (see below), whose sum is σ = 30759960. Its totient is φ = 10186128.

The previous prime is 20439439. The next prime is 20439449. The reversal of 20439446 is 64493402.

20439446 = 2259² + 2260² + ... + 2262².

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20439449) 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, 16031 + ... + 17258.

It is an arithmetic number, because the mean of its divisors is an integer number (3844995).

Almost surely, 2^20439446 is an apocalyptic number.

20439446 is a deficient number, since it is larger than the sum of its proper divisors (10320514).

20439446 is a wasteful number, since it uses less digits than its factorization.

20439446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33598.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 20439446 is about 4521.0005529750. Note that the first 3 decimals coincide. The cubic root of 20439446 is about 273.4154426463.

The spelling of 20439446 in words is "twenty million, four hundred thirty-nine thousand, four hundred forty-six".