19397739630 has 16 divisors (see below), whose sum is σ = 46554575184. Its totient is φ = 5172730560.

The previous prime is 19397739509. The next prime is 19397739631. The reversal of 19397739630 is 3693779391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19397739631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323295631 + ... + 323295690.

It is an arithmetic number, because the mean of its divisors is an integer number (2909660949).

Almost surely, 2^19397739630 is an apocalyptic number.

19397739630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19397739630 is an abundant number, since it is smaller than the sum of its proper divisors (27156835554).

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

19397739630 is a wasteful number, since it uses less digits than its factorization.

19397739630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646591331.

The product of its (nonzero) digits is 5786802, while the sum is 57.

The spelling of 19397739630 in words is "nineteen billion, three hundred ninety-seven million, seven hundred thirty-nine thousand, six hundred thirty".