20855878760 has 32 divisors (see below), whose sum is σ = 47136176640. Its totient is φ = 8304938304.

The previous prime is 20855878753. The next prime is 20855878777. The reversal of 20855878760 is 6787855802.

It is a junction number, because it is equal to n+sod(n) for n = 20855878696 and 20855878705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160132 + ... + 1177971.

It is an arithmetic number, because the mean of its divisors is an integer number (1473005520).

Almost surely, 2^20855878760 is an apocalyptic number.

20855878760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20855878760 is an abundant number, since it is smaller than the sum of its proper divisors (26280297880).

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

20855878760 is a wasteful number, since it uses less digits than its factorization.

20855878760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338337 (or 2338333 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 56.

The spelling of 20855878760 in words is "twenty billion, eight hundred fifty-five million, eight hundred seventy-eight thousand, seven hundred sixty".