20307849440377 has 2 divisors, whose sum is σ = 20307849440378. Its totient is φ = 20307849440376.

The previous prime is 20307849440251. The next prime is 20307849440413. The reversal of 20307849440377 is 77304494870302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12637769041296 + 7670080399081 = 3554964^2 + 2769491^2 .

It is a cyclic number.

It is not a de Polignac number, because 20307849440377 - 2¹¹ = 20307849438329 is a prime.

It is not a weakly prime, because it can be changed into another prime (20307849440477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153924720188 + 10153924720189.

It is an arithmetic number, because the mean of its divisors is an integer number (10153924720189).

Almost surely, 2^{20307849440377} is an apocalyptic number.

It is an amenable number.

20307849440377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20307849440377 is an equidigital number, since it uses as much as digits as its factorization.

20307849440377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28449792, while the sum is 58.

The spelling of 20307849440377 in words is "twenty trillion, three hundred seven billion, eight hundred forty-nine million, four hundred forty thousand, three hundred seventy-seven".