20012003819 has 2 divisors, whose sum is σ = 20012003820. Its totient is φ = 20012003818.

The previous prime is 20012003801. The next prime is 20012003831. The reversal of 20012003819 is 91830021002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20012003819 - 2⁸ = 20012003563 is a prime.

It is a super-2 number, since 2×20012003819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20012002819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006001909 + 10006001910.

It is an arithmetic number, because the mean of its divisors is an integer number (10006001910).

Almost surely, 2^20012003819 is an apocalyptic number.

20012003819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012003819 is an equidigital number, since it uses as much as digits as its factorization.

20012003819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 20012003819 in words is "twenty billion, twelve million, three thousand, eight hundred nineteen".