20297960020668 has 144 divisors (see below), whose sum is σ = 53294432723840. Its totient is φ = 6005055450240.

The previous prime is 20297960020649. The next prime is 20297960020673. The reversal of 20297960020668 is 86602006979202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135973446 + ... + 136122642.

Almost surely, 2^{20297960020668} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20297960020668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26647216361920).

20297960020668 is an abundant number, since it is smaller than the sum of its proper divisors (32996472703172).

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

20297960020668 is a wasteful number, since it uses less digits than its factorization.

20297960020668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151448 (or 151435 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 20297960020668 in words is "twenty trillion, two hundred ninety-seven billion, nine hundred sixty million, twenty thousand, six hundred sixty-eight".