20632151 has 4 divisors (see below), whose sum is σ = 20693712. Its totient is φ = 20570592.

The previous prime is 20632147. The next prime is 20632159. The reversal of 20632151 is 15123602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20632151 - 2² = 20632147 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 (20632159) 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, 30275 + ... + 30948.

It is an arithmetic number, because the mean of its divisors is an integer number (5173428).

Almost surely, 2^20632151 is an apocalyptic number.

20632151 is a deficient number, since it is larger than the sum of its proper divisors (61561).

20632151 is an equidigital number, since it uses as much as digits as its factorization.

20632151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61560.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20632151 is about 4542.2627621044. The cubic root of 20632151 is about 274.2720183849.

Adding to 20632151 its reverse (15123602), we get a palindrome (35755753).

The spelling of 20632151 in words is "twenty million, six hundred thirty-two thousand, one hundred fifty-one".