1993822245 has 24 divisors (see below), whose sum is σ = 3467239776. Its totient is φ = 1059900768.

The previous prime is 1993822217. The next prime is 1993822289. The reversal of 1993822245 is 5422283991.

It is not a de Polignac number, because 1993822245 - 2²⁰ = 1992773669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1993822245.

It is a congruent number.

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, 58347 + ... + 85976.

It is an arithmetic number, because the mean of its divisors is an integer number (144468324).

Almost surely, 2^1993822245 is an apocalyptic number.

1993822245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1993822245 is a deficient number, since it is larger than the sum of its proper divisors (1473417531).

1993822245 is a wasteful number, since it uses less digits than its factorization.

1993822245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144641 (or 144638 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1993822245 is about 44652.2367300900. The cubic root of 1993822245 is about 1258.6224646578.

The spelling of 1993822245 in words is "one billion, nine hundred ninety-three million, eight hundred twenty-two thousand, two hundred forty-five".