20474665919 has 2 divisors, whose sum is σ = 20474665920. Its totient is φ = 20474665918.

The previous prime is 20474665909. The next prime is 20474665933. The reversal of 20474665919 is 91956647402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20474665919 - 2²⁰ = 20473617343 is a prime.

It is a super-2 number, since 2×20474665919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20474665909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10237332959 + 10237332960.

It is an arithmetic number, because the mean of its divisors is an integer number (10237332960).

Almost surely, 2^20474665919 is an apocalyptic number.

20474665919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20474665919 is an equidigital number, since it uses as much as digits as its factorization.

20474665919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 20474665919 in words is "twenty billion, four hundred seventy-four million, six hundred sixty-five thousand, nine hundred nineteen".