20039451 has 8 divisors (see below), whose sum is σ = 26739984. Its totient is φ = 13349280.

The previous prime is 20039443. The next prime is 20039473. The reversal of 20039451 is 15493002.

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

It is not a de Polignac number, because 20039451 - 2³ = 20039443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20039251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5941 + ... + 8681.

It is an arithmetic number, because the mean of its divisors is an integer number (3342498).

Almost surely, 2^20039451 is an apocalyptic number.

20039451 is a deficient number, since it is larger than the sum of its proper divisors (6700533).

20039451 is a wasteful number, since it uses less digits than its factorization.

20039451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20039451 is about 4476.5445379221. The cubic root of 20039451 is about 271.6201219183.

The spelling of 20039451 in words is "twenty million, thirty-nine thousand, four hundred fifty-one".