19980925352640 has 896 divisors, whose sum is σ = 81976612515840. Its totient is φ = 4487093452800.

The previous prime is 19980925352629. The next prime is 19980925352657. The reversal of 19980925352640 is 4625352908991.

19980925352640 is a `hidden beast` number, since 1 + 9 + 9 + 8 + 0 + 92 + 535 + 2 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1258157500 + ... + 1258173380.

It is an arithmetic number, because the mean of its divisors is an integer number (91491755040).

Almost surely, 2^{19980925352640} is an apocalyptic number.

19980925352640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19980925352640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40988306257920).

19980925352640 is an abundant number, since it is smaller than the sum of its proper divisors (61995687163200).

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

19980925352640 is a wasteful number, since it uses less digits than its factorization.

19980925352640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16278 (or 16262 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 63.

The spelling of 19980925352640 in words is "nineteen trillion, nine hundred eighty billion, nine hundred twenty-five million, three hundred fifty-two thousand, six hundred forty".