102020194689 has 32 divisors (see below), whose sum is σ = 163906176000. Its totient is φ = 55139621184.

The previous prime is 102020194669. The next prime is 102020194699. The reversal of 102020194689 is 986491020201.

It is not a de Polignac number, because 102020194689 - 2¹² = 102020190593 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102020194689.

It is not an unprimeable number, because it can be changed into a prime (102020194669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40447 + ... + 453515.

It is an arithmetic number, because the mean of its divisors is an integer number (5122068000).

Almost surely, 2^102020194689 is an apocalyptic number.

102020194689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

102020194689 is a deficient number, since it is larger than the sum of its proper divisors (61885981311).

102020194689 is a wasteful number, since it uses less digits than its factorization.

102020194689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413717.

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 102020194689 in words is "one hundred two billion, twenty million, one hundred ninety-four thousand, six hundred eighty-nine".