20080919 has 2 divisors, whose sum is σ = 20080920. Its totient is φ = 20080918.

The previous prime is 20080861. The next prime is 20080933. The reversal of 20080919 is 91908002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20080919 is a prime.

It is a super-2 number, since 2×20080919² = 806486615769122, which contains 22 as substring.

It is equal to p_1275446 and since 20080919 and 1275446 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 20080891 and 20080900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20080969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10040459 + 10040460.

It is an arithmetic number, because the mean of its divisors is an integer number (10040460).

Almost surely, 2^20080919 is an apocalyptic number.

20080919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20080919 is an equidigital number, since it uses as much as digits as its factorization.

20080919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 20080919 is about 4481.1738417517. The cubic root of 20080919 is about 271.8073489844.

The spelling of 20080919 in words is "twenty million, eighty thousand, nine hundred nineteen".