20551756685112 has 24 divisors (see below), whose sum is σ = 55661007689040. Its totient is φ = 6850585561680.

The previous prime is 20551756685107. The next prime is 20551756685137. The reversal of 20551756685112 is 21158665715502.

20551756685112 is a `hidden beast` number, since 2 + 0 + 5 + 5 + 17 + 56 + 68 + 511 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142720532464 + ... + 142720532607.

It is an arithmetic number, because the mean of its divisors is an integer number (2319208653710).

Almost surely, 2^{20551756685112} is an apocalyptic number.

It is an amenable number.

20551756685112 is an abundant number, since it is smaller than the sum of its proper divisors (35109251003928).

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

20551756685112 is a wasteful number, since it uses less digits than its factorization.

20551756685112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285441065083 (or 285441065076 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 54.

The spelling of 20551756685112 in words is "twenty trillion, five hundred fifty-one billion, seven hundred fifty-six million, six hundred eighty-five thousand, one hundred twelve".