18969011049 has 4 divisors (see below), whose sum is σ = 25292014736. Its totient is φ = 12646007364.

The previous prime is 18969011027. The next prime is 18969011071. The reversal of 18969011049 is 94011096981.

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.

It is an interprime number because it is at equal distance from previous prime (18969011027) and next prime (18969011071).

It is not a de Polignac number, because 18969011049 - 2⁸ = 18969010793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18969010989 and 18969011007.

It is not an unprimeable number, because it can be changed into a prime (18969011549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3161501839 + ... + 3161501844.

It is an arithmetic number, because the mean of its divisors is an integer number (6323003684).

Almost surely, 2^18969011049 is an apocalyptic number.

It is an amenable number.

18969011049 is a deficient number, since it is larger than the sum of its proper divisors (6323003687).

18969011049 is an equidigital number, since it uses as much as digits as its factorization.

18969011049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323003686.

The product of its (nonzero) digits is 139968, while the sum is 48.

The spelling of 18969011049 in words is "eighteen billion, nine hundred sixty-nine million, eleven thousand, forty-nine".