20384397 has 24 divisors (see below), whose sum is σ = 33814560. Its totient is φ = 11702880.

The previous prime is 20384387. The next prime is 20384407. The reversal of 20384397 is 79348302.

It is an interprime number because it is at equal distance from previous prime (20384387) and next prime (20384407).

It is not a de Polignac number, because 20384397 - 2⁴ = 20384381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20384317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3538 + ... + 7299.

It is an arithmetic number, because the mean of its divisors is an integer number (1408940).

Almost surely, 2^20384397 is an apocalyptic number.

It is an amenable number.

20384397 is a deficient number, since it is larger than the sum of its proper divisors (13430163).

20384397 is a wasteful number, since it uses less digits than its factorization.

20384397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10873 (or 10870 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 20384397 is about 4514.9083047167. The cubic root of 20384397 is about 273.1697611778.

The spelling of 20384397 in words is "twenty million, three hundred eighty-four thousand, three hundred ninety-seven".