20538153 has 6 divisors (see below), whose sum is σ = 29666234. Its totient is φ = 13692096.

The previous prime is 20538143. The next prime is 20538157. The reversal of 20538153 is 35183502.

It can be written as a sum of positive squares in only one way, i.e., 18429849 + 2108304 = 4293^2 + 1452^2 .

It is not a de Polignac number, because 20538153 - 2⁴ = 20538137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20538157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1141000 + ... + 1141017.

Almost surely, 2^20538153 is an apocalyptic number.

It is an amenable number.

20538153 is a deficient number, since it is larger than the sum of its proper divisors (9128081).

20538153 is a wasteful number, since it uses less digits than its factorization.

20538153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282023 (or 2282020 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20538153 is about 4531.9039045417. The cubic root of 20538153 is about 273.8548656849.

The spelling of 20538153 in words is "twenty million, five hundred thirty-eight thousand, one hundred fifty-three".