20660150621546 has 16 divisors (see below), whose sum is σ = 33302929363776. Its totient is φ = 9577313017536.

The previous prime is 20660150621543. The next prime is 20660150621587. The reversal of 20660150621546 is 64512605106602.

It is a junction number, because it is equal to n+sod(n) for n = 20660150621497 and 20660150621506.

It is not an unprimeable number, because it can be changed into a prime (20660150621543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4534710326 + ... + 4534714881.

It is an arithmetic number, because the mean of its divisors is an integer number (2081433085236).

Almost surely, 2^{20660150621546} is an apocalyptic number.

20660150621546 is a deficient number, since it is larger than the sum of its proper divisors (12642778742230).

20660150621546 is a wasteful number, since it uses less digits than its factorization.

20660150621546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9069425293.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 20660150621546 in words is "twenty trillion, six hundred sixty billion, one hundred fifty million, six hundred twenty-one thousand, five hundred forty-six".