19746064830 has 64 divisors (see below), whose sum is σ = 51044970240. Its totient is φ = 4872462336.

The previous prime is 19746064829. The next prime is 19746064843. The reversal of 19746064830 is 3846064791.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19746064830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378307 + ... + 427326.

It is an arithmetic number, because the mean of its divisors is an integer number (797577660).

Almost surely, 2^19746064830 is an apocalyptic number.

19746064830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19746064830 is an abundant number, since it is smaller than the sum of its proper divisors (31298905410).

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

19746064830 is a wasteful number, since it uses less digits than its factorization.

19746064830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805705.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 19746064830 in words is "nineteen billion, seven hundred forty-six million, sixty-four thousand, eight hundred thirty".