19964690140 has 24 divisors (see below), whose sum is σ = 43058981952. Its totient is φ = 7770041280.

The previous prime is 19964690089. The next prime is 19964690143. The reversal of 19964690140 is 4109646991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19964690143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13488916 + ... + 13490395.

It is an arithmetic number, because the mean of its divisors is an integer number (1794124248).

Almost surely, 2^19964690140 is an apocalyptic number.

19964690140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19964690140 is an abundant number, since it is smaller than the sum of its proper divisors (23094291812).

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

19964690140 is a wasteful number, since it uses less digits than its factorization.

19964690140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26979357 (or 26979355 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 19964690140 in words is "nineteen billion, nine hundred sixty-four million, six hundred ninety thousand, one hundred forty".