20455560102642 has 24 divisors (see below), whose sum is σ = 47590486770096. Its totient is φ = 5844445743528.

The previous prime is 20455560102619. The next prime is 20455560102667. The reversal of 20455560102642 is 24620106555402.

It is a happy number.

It is a super-2 number, since 2×20455560102642² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 20455560102594 and 20455560102603.

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, 34788367228 + ... + 34788367815.

It is an arithmetic number, because the mean of its divisors is an integer number (1982936948754).

Almost surely, 2^{20455560102642} is an apocalyptic number.

20455560102642 is an abundant number, since it is smaller than the sum of its proper divisors (27134926667454).

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

20455560102642 is a wasteful number, since it uses less digits than its factorization.

20455560102642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69576735062 (or 69576735055 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 20455560102642 in words is "twenty trillion, four hundred fifty-five billion, five hundred sixty million, one hundred two thousand, six hundred forty-two".