20107139 has 8 divisors (see below), whose sum is σ = 21739872. Its totient is φ = 18486720.

The previous prime is 20107133. The next prime is 20107151. The reversal of 20107139 is 93170102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20107139 - 2²⁴ = 3329923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20107133) 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 7 ways as a sum of consecutive naturals, for example, 479 + ... + 6359.

It is an arithmetic number, because the mean of its divisors is an integer number (2717484).

Almost surely, 2^20107139 is an apocalyptic number.

20107139 is a deficient number, since it is larger than the sum of its proper divisors (1632733).

20107139 is a wasteful number, since it uses less digits than its factorization.

20107139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 20107139 is about 4484.0984601144. The cubic root of 20107139 is about 271.9255987033.

The spelling of 20107139 in words is "twenty million, one hundred seven thousand, one hundred thirty-nine".