20700105155660 has 96 divisors (see below), whose sum is σ = 50315301980160. Its totient is φ = 7006479637248.

The previous prime is 20700105155647. The next prime is 20700105155669. The reversal of 20700105155660 is 6655150100702.

It is not an unprimeable number, because it can be changed into a prime (20700105155669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93268742 + ... + 93490418.

It is an arithmetic number, because the mean of its divisors is an integer number (524117728960).

Almost surely, 2^{20700105155660} is an apocalyptic number.

20700105155660 is a gapful number since it is divisible by the number (20) 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 20700105155660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25157650990080).

20700105155660 is an abundant number, since it is smaller than the sum of its proper divisors (29615196824500).

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

20700105155660 is a wasteful number, since it uses less digits than its factorization.

20700105155660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230215 (or 230213 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 38.

The spelling of 20700105155660 in words is "twenty trillion, seven hundred billion, one hundred five million, one hundred fifty-five thousand, six hundred sixty".