20577338 has 4 divisors (see below), whose sum is σ = 30866010. Its totient is φ = 10288668.

The previous prime is 20577331. The next prime is 20577373. The reversal of 20577338 is 83377502.

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., 16589329 + 3988009 = 4073^2 + 1997^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20577298 and 20577307.

It is not an unprimeable number, because it can be changed into a prime (20577331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5144333 + ... + 5144336.

Almost surely, 2^20577338 is an apocalyptic number.

20577338 is a deficient number, since it is larger than the sum of its proper divisors (10288672).

20577338 is a wasteful number, since it uses less digits than its factorization.

20577338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10288671.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 20577338 is about 4536.2250825990. The cubic root of 20577338 is about 274.0289187514.

The spelling of 20577338 in words is "twenty million, five hundred seventy-seven thousand, three hundred thirty-eight".