20474439 has 8 divisors (see below), whose sum is σ = 28486272. Its totient is φ = 13056120.

The previous prime is 20474429. The next prime is 20474449. The reversal of 20474439 is 93447402.

It is an interprime number because it is at equal distance from previous prime (20474429) and next prime (20474449).

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

It is not a de Polignac number, because 20474439 - 2¹² = 20470343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148297 + ... + 148434.

It is an arithmetic number, because the mean of its divisors is an integer number (3560784).

Almost surely, 2^20474439 is an apocalyptic number.

20474439 is a deficient number, since it is larger than the sum of its proper divisors (8011833).

20474439 is a wasteful number, since it uses less digits than its factorization.

20474439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296757.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 20474439 is about 4524.8689483785. The cubic root of 20474439 is about 273.5713857468.

The spelling of 20474439 in words is "twenty million, four hundred seventy-four thousand, four hundred thirty-nine".