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20375939 = 68329833
BaseRepresentation
bin100110110111…
…0100110000011
31102100012112102
41031232212003
520204012224
62004421015
7335123033
oct115564603
942305472
1020375939
1110557821
1269a776b
1342b558c
1429c58c3
151bc74ae
hex136e983

20375939 has 4 divisors (see below), whose sum is σ = 20406456. Its totient is φ = 20345424.

The previous prime is 20375933. The next prime is 20375941. The reversal of 20375939 is 93957302.

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 20375939 - 224 = 3598723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20375933) 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, 14234 + ... + 15599.

It is an arithmetic number, because the mean of its divisors is an integer number (5101614).

Almost surely, 220375939 is an apocalyptic number.

20375939 is a deficient number, since it is larger than the sum of its proper divisors (30517).

20375939 is an equidigital number, since it uses as much as digits as its factorization.

20375939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30516.

The product of its (nonzero) digits is 51030, while the sum is 38.

The square root of 20375939 is about 4513.9715329187. The cubic root of 20375939 is about 273.1319742785.

The spelling of 20375939 in words is "twenty million, three hundred seventy-five thousand, nine hundred thirty-nine".

Divisors: 1 683 29833 20375939