19941642632 has 12 divisors (see below), whose sum is σ = 37391328855. Its totient is φ = 9970621608.

The previous prime is 19941642631. The next prime is 19941642653. The reversal of 19941642632 is 23624614991.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 9970821316 + 9970821316 = 99854^2 + 99854^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=99854.

It is a super-4 number, since 4×19941642632⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19941642631) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 374453 + ... + 424379.

Almost surely, 2^19941642632 is an apocalyptic number.

It is an amenable number.

19941642632 is a deficient number, since it is larger than the sum of its proper divisors (17449686223).

19941642632 is an frugal number, since it uses more digits than its factorization.

19941642632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99860 (or 49929 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The spelling of 19941642632 in words is "nineteen billion, nine hundred forty-one million, six hundred forty-two thousand, six hundred thirty-two".