19864714968 has 128 divisors (see below), whose sum is σ = 63201600000. Its totient is φ = 5663122560.

The previous prime is 19864714943. The next prime is 19864714973. The reversal of 19864714968 is 86941746891.

19864714968 is a `hidden beast` number, since 19 + 8 + 64 + 71 + 496 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

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, 682783 + ... + 711281.

It is an arithmetic number, because the mean of its divisors is an integer number (493762500).

Almost surely, 2^19864714968 is an apocalyptic number.

19864714968 is a gapful number since it is divisible by the number (18) 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 19864714968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31600800000).

19864714968 is an abundant number, since it is smaller than the sum of its proper divisors (43336885032).

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

19864714968 is a wasteful number, since it uses less digits than its factorization.

19864714968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28982 (or 28972 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The spelling of 19864714968 in words is "nineteen billion, eight hundred sixty-four million, seven hundred fourteen thousand, nine hundred sixty-eight".