19670449536 has 112 divisors (see below), whose sum is σ = 58754236860. Its totient is φ = 6556785408.

The previous prime is 19670449531. The next prime is 19670449553. The reversal of 19670449536 is 63594407691.

19670449536 is a `hidden beast` number, since 1 + 9 + 67 + 0 + 4 + 49 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19670449531) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 12090 + ... + 198713.

Almost surely, 2^19670449536 is an apocalyptic number.

19670449536 is a gapful number since it is divisible by the number (16) 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 19670449536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29377118430).

19670449536 is an abundant number, since it is smaller than the sum of its proper divisors (39083787324).

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

19670449536 is an frugal number, since it uses more digits than its factorization.

19670449536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210835 (or 210808 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 19670449536 in words is "nineteen billion, six hundred seventy million, four hundred forty-nine thousand, five hundred thirty-six".