20373581387 has 2 divisors, whose sum is σ = 20373581388. Its totient is φ = 20373581386.

The previous prime is 20373581369. The next prime is 20373581413. The reversal of 20373581387 is 78318537302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20373581387 is a prime.

It is not a weakly prime, because it can be changed into another prime (20373581317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186790693 + 10186790694.

It is an arithmetic number, because the mean of its divisors is an integer number (10186790694).

Almost surely, 2^20373581387 is an apocalyptic number.

20373581387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20373581387 is an equidigital number, since it uses as much as digits as its factorization.

20373581387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 20373581387 in words is "twenty billion, three hundred seventy-three million, five hundred eighty-one thousand, three hundred eighty-seven".