20274447139 has 2 divisors, whose sum is σ = 20274447140. Its totient is φ = 20274447138.

The previous prime is 20274447119. The next prime is 20274447229. The reversal of 20274447139 is 93174447202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20274447139 - 2⁵ = 20274447107 is a prime.

It is a super-2 number, since 2×20274447139² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20274447095 and 20274447104.

It is not a weakly prime, because it can be changed into another prime (20274447119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10137223569 + 10137223570.

It is an arithmetic number, because the mean of its divisors is an integer number (10137223570).

Almost surely, 2^20274447139 is an apocalyptic number.

20274447139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20274447139 is an equidigital number, since it uses as much as digits as its factorization.

20274447139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 20274447139 in words is "twenty billion, two hundred seventy-four million, four hundred forty-seven thousand, one hundred thirty-nine".