1993845464 has 16 divisors (see below), whose sum is σ = 4026034320. Its totient is φ = 920236320.

The previous prime is 1993845463. The next prime is 1993845473. The reversal of 1993845464 is 4645483991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993845463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9585692 + ... + 9585899.

It is an arithmetic number, because the mean of its divisors is an integer number (251627145).

Almost surely, 2^1993845464 is an apocalyptic number.

It is an amenable number.

1993845464 is an abundant number, since it is smaller than the sum of its proper divisors (2032188856).

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

1993845464 is a wasteful number, since it uses less digits than its factorization.

1993845464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19171610 (or 19171606 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 53.

The square root of 1993845464 is about 44652.4967275067. The cubic root of 1993845464 is about 1258.6273503895.

The spelling of 1993845464 in words is "one billion, nine hundred ninety-three million, eight hundred forty-five thousand, four hundred sixty-four".