19131669936 has 120 divisors (see below), whose sum is σ = 56879890704. Its totient is φ = 6221629440.

The previous prime is 19131669911. The next prime is 19131669941. The reversal of 19131669936 is 63996613191.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

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, 99400 + ... + 219416.

Almost surely, 2^19131669936 is an apocalyptic number.

19131669936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19131669936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28439945352).

19131669936 is an abundant number, since it is smaller than the sum of its proper divisors (37748220768).

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

19131669936 is a wasteful number, since it uses less digits than its factorization.

19131669936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120081 (or 120063 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 54.

It can be divided in two parts, 1913 and 1669936, that added together give a square (1671849 = 1293²).

The spelling of 19131669936 in words is "nineteen billion, one hundred thirty-one million, six hundred sixty-nine thousand, nine hundred thirty-six".