20144212139 has 2 divisors, whose sum is σ = 20144212140. Its totient is φ = 20144212138.

The previous prime is 20144212073. The next prime is 20144212141. The reversal of 20144212139 is 93121244102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20144212139 - 2¹² = 20144208043 is a prime.

Together with 20144212141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20144212639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072106069 + 10072106070.

It is an arithmetic number, because the mean of its divisors is an integer number (10072106070).

Almost surely, 2^20144212139 is an apocalyptic number.

20144212139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20144212139 is an equidigital number, since it uses as much as digits as its factorization.

20144212139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 20144212139 in words is "twenty billion, one hundred forty-four million, two hundred twelve thousand, one hundred thirty-nine".