19847435860 has 48 divisors (see below), whose sum is σ = 49276402560. Its totient is φ = 6570184320.

The previous prime is 19847435857. The next prime is 19847435887. The reversal of 19847435860 is 6853474891.

19847435860 = 15061² + 15062² + ... + 15147².

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, 2440206 + ... + 2448325.

It is an arithmetic number, because the mean of its divisors is an integer number (1026591720).

Almost surely, 2^19847435860 is an apocalyptic number.

19847435860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19847435860 is an abundant number, since it is smaller than the sum of its proper divisors (29428966700).

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

19847435860 is a wasteful number, since it uses less digits than its factorization.

19847435860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4888576 (or 4888574 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 19847435860 in words is "nineteen billion, eight hundred forty-seven million, four hundred thirty-five thousand, eight hundred sixty".