20869802567880 has 192 divisors, whose sum is σ = 72836302248000. Its totient is φ = 4769916350976.

The previous prime is 20869802567879. The next prime is 20869802567903. The reversal of 20869802567880 is 8876520896802.

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, 92432566 + ... + 92658074.

It is an arithmetic number, because the mean of its divisors is an integer number (379355740875).

Almost surely, 2^{20869802567880} is an apocalyptic number.

20869802567880 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 20869802567880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36418151124000).

20869802567880 is an abundant number, since it is smaller than the sum of its proper divisors (51966499680120).

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

20869802567880 is a wasteful number, since it uses less digits than its factorization.

20869802567880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241276 (or 241265 counting only the distinct ones).

The product of its (nonzero) digits is 185794560, while the sum is 69.

The spelling of 20869802567880 in words is "twenty trillion, eight hundred sixty-nine billion, eight hundred two million, five hundred sixty-seven thousand, eight hundred eighty".