20438196971107 has 2 divisors, whose sum is σ = 20438196971108. Its totient is φ = 20438196971106.

The previous prime is 20438196971039. The next prime is 20438196971119. The reversal of 20438196971107 is 70117969183402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20438196971107 is a prime.

It is not a weakly prime, because it can be changed into another prime (20438196971147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10219098485553 + 10219098485554.

It is an arithmetic number, because the mean of its divisors is an integer number (10219098485554).

Almost surely, 2^{20438196971107} is an apocalyptic number.

20438196971107 is a deficient number, since it is larger than the sum of its proper divisors (1).

20438196971107 is an equidigital number, since it uses as much as digits as its factorization.

20438196971107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 20438196971107 in words is "twenty trillion, four hundred thirty-eight billion, one hundred ninety-six million, nine hundred seventy-one thousand, one hundred seven".