19771218970 has 32 divisors (see below), whose sum is σ = 36750003840. Its totient is φ = 7653683520.

The previous prime is 19771218947. The next prime is 19771218997. The reversal of 19771218970 is 7981217791.

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 15 ways as a sum of consecutive naturals, for example, 164046 + ... + 257785.

It is an arithmetic number, because the mean of its divisors is an integer number (1148437620).

Almost surely, 2^19771218970 is an apocalyptic number.

19771218970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19771218970 is a deficient number, since it is larger than the sum of its proper divisors (16978784870).

19771218970 is a wasteful number, since it uses less digits than its factorization.

19771218970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421990.

The product of its (nonzero) digits is 444528, while the sum is 52.

The spelling of 19771218970 in words is "nineteen billion, seven hundred seventy-one million, two hundred eighteen thousand, nine hundred seventy".