20632057 has 4 divisors (see below), whose sum is σ = 20880720. Its totient is φ = 20383396.

The previous prime is 20632037. The next prime is 20632093. The reversal of 20632057 is 75023602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20632057 - 2¹⁵ = 20599289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20632037) 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, 124207 + ... + 124372.

It is an arithmetic number, because the mean of its divisors is an integer number (5220180).

Almost surely, 2^20632057 is an apocalyptic number.

It is an amenable number.

20632057 is a deficient number, since it is larger than the sum of its proper divisors (248663).

20632057 is an equidigital number, since it uses as much as digits as its factorization.

20632057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248662.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20632057 is about 4542.2524148268. The cubic root of 20632057 is about 274.2716018569.

Adding to 20632057 its reverse (75023602), we get a palindrome (95655659).

The spelling of 20632057 in words is "twenty million, six hundred thirty-two thousand, fifty-seven".