19960611840 has 704 divisors, whose sum is σ = 79233638400. Its totient is φ = 4731568128.

The previous prime is 19960611773. The next prime is 19960611841. The reversal of 19960611840 is 4811606991.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19960611841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52116289 + ... + 52116671.

Almost surely, 2^19960611840 is an apocalyptic number.

19960611840 is a gapful number since it is divisible by the number (10) 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 19960611840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39616819200).

19960611840 is an abundant number, since it is smaller than the sum of its proper divisors (59273026560).

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

19960611840 is a wasteful number, since it uses less digits than its factorization.

19960611840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 19960611840 in words is "nineteen billion, nine hundred sixty million, six hundred eleven thousand, eight hundred forty".