20537338 has 4 divisors (see below), whose sum is σ = 30806010. Its totient is φ = 10268668.

The previous prime is 20537333. The next prime is 20537353. The reversal of 20537338 is 83373502.

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

It can be written as a sum of positive squares in only one way, i.e., 18722929 + 1814409 = 4327^2 + 1347^2 .

It is not an unprimeable number, because it can be changed into a prime (20537333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5134333 + ... + 5134336.

Almost surely, 2^20537338 is an apocalyptic number.

20537338 is a deficient number, since it is larger than the sum of its proper divisors (10268672).

20537338 is a wasteful number, since it uses less digits than its factorization.

20537338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10268671.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 20537338 is about 4531.8139855912. The cubic root of 20537338 is about 273.8512432451.

The spelling of 20537338 in words is "twenty million, five hundred thirty-seven thousand, three hundred thirty-eight".