1918022795329 has 9 divisors (see below), whose sum is σ = 1926825278371. Its totient is φ = 1909260362200.

The previous prime is 1918022795317. The next prime is 1918022795357. The reversal of 1918022795329 is 9235972208191.

It is a happy number.

The square root of 1918022795329 is 1384927.

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., 1212590785329 + 705432010000 = 1101177^2 + 839900^2 .

It is not a de Polignac number, because 1918022795329 - 2⁹ = 1918022794817 is a prime.

It is a super-2 number, since 2×1918022795329² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1918022795309) 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, 314375379 + ... + 314381479.

Almost surely, 2^{1918022795329} is an apocalyptic number.

1918022795329 is the 1384927-th square number.

1918022795329 is the 692464-th centered octagonal number.

It is an amenable number.

1918022795329 is a deficient number, since it is larger than the sum of its proper divisors (8802483042).

1918022795329 is an frugal number, since it uses more digits than its factorization.

1918022795329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12656 (or 6328 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 1918022795329 in words is "one trillion, nine hundred eighteen billion, twenty-two million, seven hundred ninety-five thousand, three hundred twenty-nine".