1018921620378 has 32 divisors (see below), whose sum is σ = 2044059494400. Its totient is φ = 338605276736.

The previous prime is 1018921620371. The next prime is 1018921620403. The reversal of 1018921620378 is 8730261298101.

It is not an unprimeable number, because it can be changed into a prime (1018921620371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5210068 + ... + 5402096.

It is an arithmetic number, because the mean of its divisors is an integer number (63876859200).

Almost surely, 2^{1018921620378} is an apocalyptic number.

1018921620378 is an abundant number, since it is smaller than the sum of its proper divisors (1025137874022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1018921620378 is a wasteful number, since it uses less digits than its factorization.

1018921620378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194726.

The product of its (nonzero) digits is 290304, while the sum is 48.

The spelling of 1018921620378 in words is "one trillion, eighteen billion, nine hundred twenty-one million, six hundred twenty thousand, three hundred seventy-eight".