20869708194 has 24 divisors (see below), whose sum is σ = 45892594800. Its totient is φ = 6852739608.

The previous prime is 20869708169. The next prime is 20869708199. The reversal of 20869708194 is 49180796802.

It is a self number, because there is not a number n which added to its sum of digits gives 20869708194.

It is not an unprimeable number, because it can be changed into a prime (20869708199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8651244 + ... + 8653655.

It is an arithmetic number, because the mean of its divisors is an integer number (1912191450).

Almost surely, 2^20869708194 is an apocalyptic number.

20869708194 is an abundant number, since it is smaller than the sum of its proper divisors (25022886606).

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

20869708194 is a wasteful number, since it uses less digits than its factorization.

20869708194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17304974 (or 17304971 counting only the distinct ones).

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

The spelling of 20869708194 in words is "twenty billion, eight hundred sixty-nine million, seven hundred eight thousand, one hundred ninety-four".