20140552381 has 2 divisors, whose sum is σ = 20140552382. Its totient is φ = 20140552380.

The previous prime is 20140552343. The next prime is 20140552441. The reversal of 20140552381 is 18325504102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18342368356 + 1798184025 = 135434^2 + 42405^2 .

It is a cyclic number.

It is not a de Polignac number, because 20140552381 - 2⁷ = 20140552253 is a prime.

It is a super-2 number, since 2×20140552381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20140558381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10070276190 + 10070276191.

It is an arithmetic number, because the mean of its divisors is an integer number (10070276191).

Almost surely, 2^20140552381 is an apocalyptic number.

It is an amenable number.

20140552381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20140552381 is an equidigital number, since it uses as much as digits as its factorization.

20140552381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 20140552381 in words is "twenty billion, one hundred forty million, five hundred fifty-two thousand, three hundred eighty-one".