20110031387 has 2 divisors, whose sum is σ = 20110031388. Its totient is φ = 20110031386.

The previous prime is 20110031341. The next prime is 20110031437. The reversal of 20110031387 is 78313001102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20110031387 - 2⁸ = 20110031131 is a prime.

It is a super-2 number, since 2×20110031387² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20110031287) 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, 10055015693 + 10055015694.

It is an arithmetic number, because the mean of its divisors is an integer number (10055015694).

Almost surely, 2^20110031387 is an apocalyptic number.

20110031387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110031387 is an equidigital number, since it uses as much as digits as its factorization.

20110031387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 20110031387 its reverse (78313001102), we get a palindrome (98423032489).

The spelling of 20110031387 in words is "twenty billion, one hundred ten million, thirty-one thousand, three hundred eighty-seven".