20670954542747 has 2 divisors, whose sum is σ = 20670954542748. Its totient is φ = 20670954542746.

The previous prime is 20670954542743. The next prime is 20670954542783. The reversal of 20670954542747 is 74724545907602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20670954542747 - 2² = 20670954542743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20670954542747.

It is not a weakly prime, because it can be changed into another prime (20670954542743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10335477271373 + 10335477271374.

It is an arithmetic number, because the mean of its divisors is an integer number (10335477271374).

Almost surely, 2^{20670954542747} is an apocalyptic number.

20670954542747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20670954542747 is an equidigital number, since it uses as much as digits as its factorization.

20670954542747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118540800, while the sum is 62.

The spelling of 20670954542747 in words is "twenty trillion, six hundred seventy billion, nine hundred fifty-four million, five hundred forty-two thousand, seven hundred forty-seven".