20152819 has 2 divisors, whose sum is σ = 20152820. Its totient is φ = 20152818.

The previous prime is 20152799. The next prime is 20152823. The reversal of 20152819 is 91825102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20152819 - 2¹³ = 20144627 is a prime.

It is a super-2 number, since 2×20152819² = 812272227293522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20152829) 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 as a sum of consecutive naturals, namely, 10076409 + 10076410.

It is an arithmetic number, because the mean of its divisors is an integer number (10076410).

Almost surely, 2^20152819 is an apocalyptic number.

20152819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20152819 is an equidigital number, since it uses as much as digits as its factorization.

20152819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 20152819 is about 4489.1891249980. The cubic root of 20152819 is about 272.1313658630.

The spelling of 20152819 in words is "twenty million, one hundred fifty-two thousand, eight hundred nineteen".