20085802619 has 2 divisors, whose sum is σ = 20085802620. Its totient is φ = 20085802618.

The previous prime is 20085802537. The next prime is 20085802819. The reversal of 20085802619 is 91620858002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20085802619 is a prime.

It is a super-2 number, since 2×20085802619² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20085802819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10042901309 + 10042901310.

It is an arithmetic number, because the mean of its divisors is an integer number (10042901310).

Almost surely, 2^20085802619 is an apocalyptic number.

20085802619 is a deficient number, since it is larger than the sum of its proper divisors (1).

20085802619 is an equidigital number, since it uses as much as digits as its factorization.

20085802619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 20085802619 in words is "twenty billion, eighty-five million, eight hundred two thousand, six hundred nineteen".