19776039700 has 72 divisors (see below), whose sum is σ = 43985497248. Its totient is φ = 7713525120.

The previous prime is 19776039697. The next prime is 19776039721. The reversal of 19776039700 is 793067791.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 2804379 + ... + 2811421.

It is an arithmetic number, because the mean of its divisors is an integer number (610909684).

Almost surely, 2^19776039700 is an apocalyptic number.

19776039700 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 19776039700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21992748624).

19776039700 is an abundant number, since it is smaller than the sum of its proper divisors (24209457548).

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

19776039700 is a wasteful number, since it uses less digits than its factorization.

19776039700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7753 (or 7746 counting only the distinct ones).

The product of its (nonzero) digits is 500094, while the sum is 49.

The spelling of 19776039700 in words is "nineteen billion, seven hundred seventy-six million, thirty-nine thousand, seven hundred".