20720648425878 has 24 divisors (see below), whose sum is σ = 46342955620416. Its totient is φ = 6684080137200.

The previous prime is 20720648425849. The next prime is 20720648425901. The reversal of 20720648425878 is 87852484602702.

20720648425878 is a `hidden beast` number, since 2 + 0 + 7 + 2 + 0 + 6 + 4 + 8 + 42 + 587 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18566888713 + ... + 18566889828.

It is an arithmetic number, because the mean of its divisors is an integer number (1930956484184).

Almost surely, 2^{20720648425878} is an apocalyptic number.

20720648425878 is an abundant number, since it is smaller than the sum of its proper divisors (25622307194538).

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

20720648425878 is a wasteful number, since it uses less digits than its factorization.

20720648425878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37133778580 (or 37133778577 counting only the distinct ones).

The product of its (nonzero) digits is 96337920, while the sum is 63.

The spelling of 20720648425878 in words is "twenty trillion, seven hundred twenty billion, six hundred forty-eight million, four hundred twenty-five thousand, eight hundred seventy-eight".