20009793 has 16 divisors (see below), whose sum is σ = 29306880. Its totient is φ = 12087504.

The previous prime is 20009761. The next prime is 20009813. The reversal of 20009793 is 39790002.

It is not a de Polignac number, because 20009793 - 2⁵ = 20009761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20009793.

It is not an unprimeable number, because it can be changed into a prime (20009713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6321 + ... + 8942.

It is an arithmetic number, because the mean of its divisors is an integer number (1831680).

Almost surely, 2^20009793 is an apocalyptic number.

20009793 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20009793 is a deficient number, since it is larger than the sum of its proper divisors (9297087).

20009793 is a wasteful number, since it uses less digits than its factorization.

20009793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15308.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 20009793 is about 4473.2307116893. The cubic root of 20009793 is about 271.4860582499.

Adding to 20009793 its reverse (39790002), we get a palindrome (59799795).

It can be divided in two parts, 20009 and 793, that added together give a palindrome (20802).

The spelling of 20009793 in words is "twenty million, nine thousand, seven hundred ninety-three".