20331051 has 8 divisors (see below), whose sum is σ = 29193360. Its totient is φ = 12511392.

The previous prime is 20331043. The next prime is 20331053. The reversal of 20331051 is 15013302.

It is a happy number.

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

It is not a de Polignac number, because 20331051 - 2³ = 20331043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20331051.

It is not an unprimeable number, because it can be changed into a prime (20331053) 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, 260616 + ... + 260693.

It is an arithmetic number, because the mean of its divisors is an integer number (3649170).

Almost surely, 2^20331051 is an apocalyptic number.

20331051 is a deficient number, since it is larger than the sum of its proper divisors (8862309).

20331051 is a wasteful number, since it uses less digits than its factorization.

20331051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521325.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 20331051 is about 4508.9966733188. The cubic root of 20331051 is about 272.9312577661.

Adding to 20331051 its reverse (15013302), we get a palindrome (35344353).

The spelling of 20331051 in words is "twenty million, three hundred thirty-one thousand, fifty-one".