20338047 has 10 divisors (see below), whose sum is σ = 30381648. Its totient is φ = 13558644.

The previous prime is 20338027. The next prime is 20338057. The reversal of 20338047 is 74083302.

It is not a de Polignac number, because 20338047 - 2⁸ = 20337791 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20338047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20338027) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 125463 + ... + 125624.

Almost surely, 2^20338047 is an apocalyptic number.

20338047 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20338047 is a deficient number, since it is larger than the sum of its proper divisors (10043601).

20338047 is an equidigital number, since it uses as much as digits as its factorization.

20338047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251099 (or 251090 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20338047 is about 4509.7723889349. The cubic root of 20338047 is about 272.9625597732.

The spelling of 20338047 in words is "twenty million, three hundred thirty-eight thousand, forty-seven".