1999693632 has 28 divisors (see below), whose sum is σ = 5290856576. Its totient is φ = 666564480.

The previous prime is 1999693607. The next prime is 1999693639. The reversal of 1999693632 is 2363969991.

It is a super-2 number, since 2×1999693632² = 7997549243722702848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999693639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5207344 + ... + 5207727.

Almost surely, 2^1999693632 is an apocalyptic number.

1999693632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1999693632 is an abundant number, since it is smaller than the sum of its proper divisors (3291162944).

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

1999693632 is a wasteful number, since it uses less digits than its factorization.

1999693632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10415086 (or 10415076 counting only the distinct ones).

The product of its digits is 4251528, while the sum is 57.

The square root of 1999693632 is about 44717.9341204399. The cubic root of 1999693632 is about 1259.8567133609.

The spelling of 1999693632 in words is "one billion, nine hundred ninety-nine million, six hundred ninety-three thousand, six hundred thirty-two".