19702012890 has 32 divisors (see below), whose sum is σ = 54039807360. Its totient is φ = 4503317184.

The previous prime is 19702012877. The next prime is 19702012927. The reversal of 19702012890 is 9821020791.

It is an unprimeable number.

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, 46909345 + ... + 46909764.

It is an arithmetic number, because the mean of its divisors is an integer number (1688743980).

Almost surely, 2^19702012890 is an apocalyptic number.

19702012890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19702012890 is an abundant number, since it is smaller than the sum of its proper divisors (34337794470).

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

19702012890 is a wasteful number, since it uses less digits than its factorization.

19702012890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93819126.

The product of its (nonzero) digits is 18144, while the sum is 39.

It can be divided in two parts, 1970201 and 2890, that added together give a triangular number (1973091 = T₁₉₈₆).

The spelling of 19702012890 in words is "nineteen billion, seven hundred two million, twelve thousand, eight hundred ninety".