20338855 has 16 divisors (see below), whose sum is σ = 25043040. Its totient is φ = 15852672.

The previous prime is 20338853. The next prime is 20338861. The reversal of 20338855 is 55883302.

It is a cyclic number.

It is not a de Polignac number, because 20338855 - 2¹ = 20338853 is a prime.

It is a super-2 number, since 2×20338855² = 827338045422050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20338855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20338853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36237 + ... + 36793.

It is an arithmetic number, because the mean of its divisors is an integer number (1565190).

Almost surely, 2^20338855 is an apocalyptic number.

20338855 is a deficient number, since it is larger than the sum of its proper divisors (4704185).

20338855 is a wasteful number, since it uses less digits than its factorization.

20338855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 20338855 is about 4509.8619712803. The cubic root of 20338855 is about 272.9661745225.

The spelling of 20338855 in words is "twenty million, three hundred thirty-eight thousand, eight hundred fifty-five".