19995736936 has 48 divisors (see below), whose sum is σ = 43637719140. Its totient is φ = 8564774400.

The previous prime is 19995736931. The next prime is 19995736967. The reversal of 19995736936 is 63963759991.

It can be written as a sum of positive squares in 2 ways, for example, as 15612502500 + 4383234436 = 124950^2 + 66206^2 .

It is a super-2 number, since 2×19995736936² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19995736931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 731776 + ... + 758608.

Almost surely, 2^19995736936 is an apocalyptic number.

It is an amenable number.

19995736936 is an abundant number, since it is smaller than the sum of its proper divisors (23641982204).

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

19995736936 is a wasteful number, since it uses less digits than its factorization.

19995736936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28754 (or 28743 counting only the distinct ones).

The product of its digits is 74401740, while the sum is 67.

The spelling of 19995736936 in words is "nineteen billion, nine hundred ninety-five million, seven hundred thirty-six thousand, nine hundred thirty-six".