20548957 has 8 divisors (see below), whose sum is σ = 24141600. Its totient is φ = 17243760.

The previous prime is 20548951. The next prime is 20548961. The reversal of 20548957 is 75984502.

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 20548957 - 2¹¹ = 20546909 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 (20548951) 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, 71707 + ... + 71992.

It is an arithmetic number, because the mean of its divisors is an integer number (3017700).

Almost surely, 2^20548957 is an apocalyptic number.

It is an amenable number.

20548957 is a deficient number, since it is larger than the sum of its proper divisors (3592643).

20548957 is a wasteful number, since it uses less digits than its factorization.

20548957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143723.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 20548957 is about 4533.0957413229. The cubic root of 20548957 is about 273.9028772938.

It can be divided in two parts, 2054 and 8957, that added together give a palindrome (11011).

The spelling of 20548957 in words is "twenty million, five hundred forty-eight thousand, nine hundred fifty-seven".