20553151 has 8 divisors (see below), whose sum is σ = 21004704. Its totient is φ = 20106240.

The previous prime is 20553139. The next prime is 20553179. The reversal of 20553151 is 15135502.

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 20553151 - 2⁷ = 20553023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8671 + ... + 10783.

It is an arithmetic number, because the mean of its divisors is an integer number (2625588).

Almost surely, 2^20553151 is an apocalyptic number.

20553151 is a deficient number, since it is larger than the sum of its proper divisors (451553).

20553151 is a wasteful number, since it uses less digits than its factorization.

20553151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 20553151 is about 4533.5583154957. The cubic root of 20553151 is about 273.9215103648.

Adding to 20553151 its reverse (15135502), we get a palindrome (35688653).

The spelling of 20553151 in words is "twenty million, five hundred fifty-three thousand, one hundred fifty-one".