19977092329 has 4 divisors (see below), whose sum is σ = 19997251840. Its totient is φ = 19956932820.

The previous prime is 19977092231. The next prime is 19977092339. The reversal of 19977092329 is 92329077991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92329077991 = 433 ⋅213231127.

It is a cyclic number.

It is not a de Polignac number, because 19977092329 - 2⁹ = 19977091817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19977092339) 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 in 3 ways as a sum of consecutive naturals, for example, 10078269 + ... + 10080250.

It is an arithmetic number, because the mean of its divisors is an integer number (4999312960).

Almost surely, 2^19977092329 is an apocalyptic number.

It is an amenable number.

19977092329 is a deficient number, since it is larger than the sum of its proper divisors (20159511).

19977092329 is an equidigital number, since it uses as much as digits as its factorization.

19977092329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20159510.

The product of its (nonzero) digits is 3857868, while the sum is 58.

The spelling of 19977092329 in words is "nineteen billion, nine hundred seventy-seven million, ninety-two thousand, three hundred twenty-nine".