20021701685055 has 32 divisors (see below), whose sum is σ = 36637281408000. Its totient is φ = 9146235474432.

The previous prime is 20021701685023. The next prime is 20021701685113. The reversal of 20021701685055 is 55058610712002.

It is not a de Polignac number, because 20021701685055 - 2⁵ = 20021701685023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20021701684998 and 20021701685016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68002810 + ... + 68296599.

It is an arithmetic number, because the mean of its divisors is an integer number (1144915044000).

Almost surely, 2^{20021701685055} is an apocalyptic number.

20021701685055 is a deficient number, since it is larger than the sum of its proper divisors (16615579722945).

20021701685055 is a wasteful number, since it uses less digits than its factorization.

20021701685055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136300823.

The product of its (nonzero) digits is 168000, while the sum is 42.

The spelling of 20021701685055 in words is "twenty trillion, twenty-one billion, seven hundred one million, six hundred eighty-five thousand, fifty-five".