19886402970 has 384 divisors, whose sum is σ = 65407979520. Its totient is φ = 4087480320.

The previous prime is 19886402969. The next prime is 19886402981. The reversal of 19886402970 is 7920468891.

19886402970 is a `hidden beast` number, since 1 + 98 + 86 + 402 + 9 + 70 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 29548554 + ... + 29549226.

It is an arithmetic number, because the mean of its divisors is an integer number (170333280).

Almost surely, 2^19886402970 is an apocalyptic number.

19886402970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19886402970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32703989760).

19886402970 is an abundant number, since it is smaller than the sum of its proper divisors (45521576550).

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

19886402970 is a wasteful number, since it uses less digits than its factorization.

19886402970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 19886402970 in words is "nineteen billion, eight hundred eighty-six million, four hundred two thousand, nine hundred seventy".