20197950996608 has 192 divisors, whose sum is σ = 50567503761600. Its totient is φ = 7866146027520.

The previous prime is 20197950996583. The next prime is 20197950996623. The reversal of 20197950996608 is 80669905979102.

It is a super-2 number, since 2×20197950996608² (a number of 27 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 277183283 + ... + 277256141.

It is an arithmetic number, because the mean of its divisors is an integer number (263372415425).

Almost surely, 2^{20197950996608} is an apocalyptic number.

20197950996608 is a gapful number since it is divisible by the number (28) 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 20197950996608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25283751880800).

20197950996608 is an abundant number, since it is smaller than the sum of its proper divisors (30369552764992).

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

20197950996608 is a wasteful number, since it uses less digits than its factorization.

20197950996608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75459 (or 75436 counting only the distinct ones).

The product of its (nonzero) digits is 132269760, while the sum is 71.

The spelling of 20197950996608 in words is "twenty trillion, one hundred ninety-seven billion, nine hundred fifty million, nine hundred ninety-six thousand, six hundred eight".