20331424 has 24 divisors (see below), whose sum is σ = 40164768. Its totient is φ = 10130880.

The previous prime is 20331419. The next prime is 20331461. The reversal of 20331424 is 42413302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10189 + ... + 12019.

It is an arithmetic number, because the mean of its divisors is an integer number (1673532).

Almost surely, 2^20331424 is an apocalyptic number.

It is an amenable number.

20331424 is a deficient number, since it is larger than the sum of its proper divisors (19833344).

20331424 is a wasteful number, since it uses less digits than its factorization.

20331424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2180 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20331424 is about 4509.0380348806. The cubic root of 20331424 is about 272.9329268507.

Adding to 20331424 its reverse (42413302), we get a palindrome (62744726).

The spelling of 20331424 in words is "twenty million, three hundred thirty-one thousand, four hundred twenty-four".