19440549917252 has 24 divisors (see below), whose sum is σ = 34149577343616. Its totient is φ = 9683539733088.

The previous prime is 19440549917237. The next prime is 19440549917267. The reversal of 19440549917252 is 25271994504491.

It is an interprime number because it is at equal distance from previous prime (19440549917237) and next prime (19440549917267).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5054363 + ... + 8026685.

It is an arithmetic number, because the mean of its divisors is an integer number (1422899055984).

Almost surely, 2^{19440549917252} is an apocalyptic number.

It is an amenable number.

19440549917252 is a deficient number, since it is larger than the sum of its proper divisors (14709027426364).

19440549917252 is a wasteful number, since it uses less digits than its factorization.

19440549917252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978507 (or 2978505 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 19440549917252 in words is "nineteen trillion, four hundred forty billion, five hundred forty-nine million, nine hundred seventeen thousand, two hundred fifty-two".