20034440873947 has 2 divisors, whose sum is σ = 20034440873948. Its totient is φ = 20034440873946.

The previous prime is 20034440873929. The next prime is 20034440874023. The reversal of 20034440873947 is 74937804443002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20034440873947 - 2¹⁹ = 20034440349659 is a prime.

It is a super-2 number, since 2×20034440873947² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20034440873917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10017220436973 + 10017220436974.

It is an arithmetic number, because the mean of its divisors is an integer number (10017220436974).

Almost surely, 2^{20034440873947} is an apocalyptic number.

20034440873947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20034440873947 is an equidigital number, since it uses as much as digits as its factorization.

20034440873947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16257024, while the sum is 55.

The spelling of 20034440873947 in words is "twenty trillion, thirty-four billion, four hundred forty million, eight hundred seventy-three thousand, nine hundred forty-seven".