20486939 has 16 divisors (see below), whose sum is σ = 23414784. Its totient is φ = 17755200.

The previous prime is 20486933. The next prime is 20486953. The reversal of 20486939 is 93968402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20486939 - 2⁴ = 20486923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20486896 and 20486905.

It is not an unprimeable number, because it can be changed into a prime (20486933) 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, 24482 + ... + 25304.

It is an arithmetic number, because the mean of its divisors is an integer number (1463424).

Almost surely, 2^20486939 is an apocalyptic number.

20486939 is a deficient number, since it is larger than the sum of its proper divisors (2927845).

20486939 is a wasteful number, since it uses less digits than its factorization.

20486939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 20486939 is about 4526.2499930958. The cubic root of 20486939 is about 273.6270477788.

The spelling of 20486939 in words is "twenty million, four hundred eighty-six thousand, nine hundred thirty-nine".