20027873729 has 2 divisors, whose sum is σ = 20027873730. Its totient is φ = 20027873728.

The previous prime is 20027873713. The next prime is 20027873741. The reversal of 20027873729 is 92737872002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16698583729 + 3329290000 = 129223^2 + 57700^2 .

It is a cyclic number.

It is not a de Polignac number, because 20027873729 - 2⁴ = 20027873713 is a prime.

It is a super-2 number, since 2×20027873729² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20027873779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10013936864 + 10013936865.

It is an arithmetic number, because the mean of its divisors is an integer number (10013936865).

Almost surely, 2^20027873729 is an apocalyptic number.

It is an amenable number.

20027873729 is a deficient number, since it is larger than the sum of its proper divisors (1).

20027873729 is an equidigital number, since it uses as much as digits as its factorization.

20027873729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 47.

The spelling of 20027873729 in words is "twenty billion, twenty-seven million, eight hundred seventy-three thousand, seven hundred twenty-nine".