1929821137320 has 96 divisors (see below), whose sum is σ = 6052123576800. Its totient is φ = 492244215936.

The previous prime is 1929821137313. The next prime is 1929821137331. The reversal of 1929821137320 is 237311289291.

It is a self number, because there is not a number n which added to its sum of digits gives 1929821137320.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15136750 + ... + 15263709.

It is an arithmetic number, because the mean of its divisors is an integer number (63042953925).

Almost surely, 2^{1929821137320} is an apocalyptic number.

1929821137320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1929821137320 is an abundant number, since it is smaller than the sum of its proper divisors (4122302439480).

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

1929821137320 is a wasteful number, since it uses less digits than its factorization.

1929821137320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30400519 (or 30400492 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 1929821137320 in words is "one trillion, nine hundred twenty-nine billion, eight hundred twenty-one million, one hundred thirty-seven thousand, three hundred twenty".