20377606091 has 2 divisors, whose sum is σ = 20377606092. Its totient is φ = 20377606090.

The previous prime is 20377606063. The next prime is 20377606129. The reversal of 20377606091 is 19060677302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20377606091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20377606891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10188803045 + 10188803046.

It is an arithmetic number, because the mean of its divisors is an integer number (10188803046).

Almost surely, 2^20377606091 is an apocalyptic number.

20377606091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20377606091 is an equidigital number, since it uses as much as digits as its factorization.

20377606091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The spelling of 20377606091 in words is "twenty billion, three hundred seventy-seven million, six hundred six thousand, ninety-one".