19649077000 has 128 divisors (see below), whose sum is σ = 52902720000. Its totient is φ = 6691257600.

The previous prime is 19649076989. The next prime is 19649077009. The reversal of 19649077000 is 77094691.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19649077009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1033581 + ... + 1052419.

It is an arithmetic number, because the mean of its divisors is an integer number (413302500).

Almost surely, 2^19649077000 is an apocalyptic number.

19649077000 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 19649077000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26451360000).

19649077000 is an abundant number, since it is smaller than the sum of its proper divisors (33253643000).

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

19649077000 is a wasteful number, since it uses less digits than its factorization.

19649077000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19016 (or 19002 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 43.

The spelling of 19649077000 in words is "nineteen billion, six hundred forty-nine million, seventy-seven thousand".