19923901870 has 32 divisors (see below), whose sum is σ = 36241701696. Its totient is φ = 7885824000.

The previous prime is 19923901849. The next prime is 19923901873. The reversal of 19923901870 is 7810932991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19923901873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362400 + ... + 413740.

It is an arithmetic number, because the mean of its divisors is an integer number (1132553178).

Almost surely, 2^19923901870 is an apocalyptic number.

19923901870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19923901870 is a deficient number, since it is larger than the sum of its proper divisors (16317799826).

19923901870 is a wasteful number, since it uses less digits than its factorization.

19923901870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51756.

The product of its (nonzero) digits is 244944, while the sum is 49.

The spelling of 19923901870 in words is "nineteen billion, nine hundred twenty-three million, nine hundred one thousand, eight hundred seventy".