20144474 has 8 divisors (see below), whose sum is σ = 34533408. Its totient is φ = 8633340.

The previous prime is 20144471. The next prime is 20144479. The reversal of 20144474 is 47444102.

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

It is not an unprimeable number, because it can be changed into a prime (20144471) 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, 719432 + ... + 719459.

It is an arithmetic number, because the mean of its divisors is an integer number (4316676).

Almost surely, 2^20144474 is an apocalyptic number.

20144474 is a deficient number, since it is larger than the sum of its proper divisors (14388934).

20144474 is a wasteful number, since it uses less digits than its factorization.

20144474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438900.

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 20144474 is about 4488.2595735987. The cubic root of 20144474 is about 272.0937987486.

Adding to 20144474 its reverse (47444102), we get a palindrome (67588576).

The spelling of 20144474 in words is "twenty million, one hundred forty-four thousand, four hundred seventy-four".