19378630776 has 64 divisors (see below), whose sum is σ = 49612147200. Its totient is φ = 6304370688.

The previous prime is 19378630729. The next prime is 19378630781. The reversal of 19378630776 is 67703687391.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1447425 + ... + 1460751.

It is an arithmetic number, because the mean of its divisors is an integer number (775189800).

Almost surely, 2^19378630776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19378630776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24806073600).

19378630776 is an abundant number, since it is smaller than the sum of its proper divisors (30233516424).

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

19378630776 is a wasteful number, since it uses less digits than its factorization.

19378630776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14788 (or 14784 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 57.

The spelling of 19378630776 in words is "nineteen billion, three hundred seventy-eight million, six hundred thirty thousand, seven hundred seventy-six".