21446650205106 has 32 divisors (see below), whose sum is σ = 49021992019968. Its totient is φ = 6127479686160.

The previous prime is 21446650205093. The next prime is 21446650205129. The reversal of 21446650205106 is 60150205664412.

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

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, 3668890 + ... + 7506933.

It is an arithmetic number, because the mean of its divisors is an integer number (1531937250624).

Almost surely, 2^{21446650205106} is an apocalyptic number.

21446650205106 is an abundant number, since it is smaller than the sum of its proper divisors (27575341814862).

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

21446650205106 is a wasteful number, since it uses less digits than its factorization.

21446650205106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11221526.

The product of its (nonzero) digits is 345600, while the sum is 42.

Adding to 21446650205106 its reverse (60150205664412), we get a palindrome (81596855869518).

The spelling of 21446650205106 in words is "twenty-one trillion, four hundred forty-six billion, six hundred fifty million, two hundred five thousand, one hundred six".