20301139 has 4 divisors (see below), whose sum is σ = 21369640. Its totient is φ = 19232640.

The previous prime is 20301137. The next prime is 20301181. The reversal of 20301139 is 93110302.

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

It is a cyclic number.

It is not a de Polignac number, because 20301139 - 2¹ = 20301137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1068481 = 20301139 / (2 + 0 + 3 + 0 + 1 + 1 + 3 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20301137) 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 3 ways as a sum of consecutive naturals, for example, 534222 + ... + 534259.

It is an arithmetic number, because the mean of its divisors is an integer number (5342410).

Almost surely, 2^20301139 is an apocalyptic number.

20301139 is a deficient number, since it is larger than the sum of its proper divisors (1068501).

20301139 is a wasteful number, since it uses less digits than its factorization.

20301139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068500.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 20301139 is about 4505.6785282574. The cubic root of 20301139 is about 272.7973422957.

The spelling of 20301139 in words is "twenty million, three hundred one thousand, one hundred thirty-nine".