19701841956 has 12 divisors (see below), whose sum is σ = 45970964592. Its totient is φ = 6567280648.

The previous prime is 19701841937. The next prime is 19701841961. The reversal of 19701841956 is 65914810791.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 19701841899 and 19701841908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820910070 + ... + 820910093.

It is an arithmetic number, because the mean of its divisors is an integer number (3830913716).

Almost surely, 2^19701841956 is an apocalyptic number.

It is an amenable number.

19701841956 is an abundant number, since it is smaller than the sum of its proper divisors (26269122636).

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

19701841956 is a wasteful number, since it uses less digits than its factorization.

19701841956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641820170 (or 1641820168 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 19701841956 in words is "nineteen billion, seven hundred one million, eight hundred forty-one thousand, nine hundred fifty-six".