20738153 has 4 divisors (see below), whose sum is σ = 20777028. Its totient is φ = 20699280.

The previous prime is 20738141. The next prime is 20738173. The reversal of 20738153 is 35183702.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11202409 + 9535744 = 3347^2 + 3088^2 .

It is a cyclic number.

It is not a de Polignac number, because 20738153 - 2⁸ = 20737897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20738173) 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, 18626 + ... + 19707.

It is an arithmetic number, because the mean of its divisors is an integer number (5194257).

Almost surely, 2^20738153 is an apocalyptic number.

It is an amenable number.

20738153 is a deficient number, since it is larger than the sum of its proper divisors (38875).

20738153 is an equidigital number, since it uses as much as digits as its factorization.

20738153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38874.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20738153 is about 4553.9162267218. The cubic root of 20738153 is about 274.7409262547.

The spelling of 20738153 in words is "twenty million, seven hundred thirty-eight thousand, one hundred fifty-three".