20568493700890 has 32 divisors (see below), whose sum is σ = 39201503307840. Its totient is φ = 7743359019264.

The previous prime is 20568493700857. The next prime is 20568493700917. The reversal of 20568493700890 is 9800739486502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19292529 + ... + 20330731.

It is an arithmetic number, because the mean of its divisors is an integer number (1225046978370).

Almost surely, 2^{20568493700890} is an apocalyptic number.

20568493700890 is a deficient number, since it is larger than the sum of its proper divisors (18633009606950).

20568493700890 is a wasteful number, since it uses less digits than its factorization.

20568493700890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154766.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 20568493700890 in words is "twenty trillion, five hundred sixty-eight billion, four hundred ninety-three million, seven hundred thousand, eight hundred ninety".