20328951 has 8 divisors (see below), whose sum is σ = 27160560. Its totient is φ = 13524992.

The previous prime is 20328949. The next prime is 20328953. The reversal of 20328951 is 15982302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20328949) and next prime (20328953).

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

It is a cyclic number.

It is not a de Polignac number, because 20328951 - 2¹ = 20328949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20328953) 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, 5130 + ... + 8183.

It is an arithmetic number, because the mean of its divisors is an integer number (3395070).

Almost surely, 2^20328951 is an apocalyptic number.

20328951 is a deficient number, since it is larger than the sum of its proper divisors (6831609).

20328951 is a wasteful number, since it uses less digits than its factorization.

20328951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13825.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 20328951 is about 4508.7637995353. The cubic root of 20328951 is about 272.9218603936.

The spelling of 20328951 in words is "twenty million, three hundred twenty-eight thousand, nine hundred fifty-one".