19914290026849 has 9 divisors (see below), whose sum is σ = 20577551891859. Its totient is φ = 19271759698080.

The previous prime is 19914290026843. The next prime is 19914290026877. The reversal of 19914290026849 is 94862009241991.

The square root of 19914290026849 is 4462543.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 462379600225 + 19451910426624 = 679985^2 + 4410432^2 .

It is not a de Polignac number, because 19914290026849 - 2⁷ = 19914290026721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19914290026843) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 138266857 + ... + 138410809.

It is an arithmetic number, because the mean of its divisors is an integer number (2286394654651).

Almost surely, 2^{19914290026849} is an apocalyptic number.

19914290026849 is the 4462543-rd square number.

19914290026849 is the 2231272-nd centered octagonal number.

It is an amenable number.

19914290026849 is a deficient number, since it is larger than the sum of its proper divisors (663261865010).

19914290026849 is an frugal number, since it uses more digits than its factorization.

19914290026849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287968 (or 143984 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 64.

The spelling of 19914290026849 in words is "nineteen trillion, nine hundred fourteen billion, two hundred ninety million, twenty-six thousand, eight hundred forty-nine".