20666044242 has 32 divisors (see below), whose sum is σ = 45929540160. Its totient is φ = 6887931840.

The previous prime is 20666044193. The next prime is 20666044303. The reversal of 20666044242 is 24244066602.

It is a super-2 number, since 2×20666044242² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20666044197 and 20666044206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 725338 + ... + 753290.

It is an arithmetic number, because the mean of its divisors is an integer number (1435298130).

Almost surely, 2^20666044242 is an apocalyptic number.

20666044242 is an abundant number, since it is smaller than the sum of its proper divisors (25263495918).

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

20666044242 is a wasteful number, since it uses less digits than its factorization.

20666044242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41655 (or 41649 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 20666044242 in words is "twenty billion, six hundred sixty-six million, forty-four thousand, two hundred forty-two".