19690868610 has 128 divisors (see below), whose sum is σ = 61946265600. Its totient is φ = 4355570880.

The previous prime is 19690868539. The next prime is 19690868621. The reversal of 19690868610 is 1686809691.

19690868610 is a `hidden beast` number, since 19 + 6 + 9 + 0 + 8 + 6 + 8 + 610 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 109450 + ... + 226629.

It is an arithmetic number, because the mean of its divisors is an integer number (483955200).

Almost surely, 2^19690868610 is an apocalyptic number.

19690868610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19690868610 is an abundant number, since it is smaller than the sum of its proper divisors (42255396990).

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

19690868610 is a wasteful number, since it uses less digits than its factorization.

19690868610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336133 (or 336127 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 19690868610 in words is "nineteen billion, six hundred ninety million, eight hundred sixty-eight thousand, six hundred ten".