21354671041606 has 24 divisors (see below), whose sum is σ = 37261881912096. Its totient is φ = 9151962578640.

The previous prime is 21354671041603. The next prime is 21354671041609. The reversal of 21354671041606 is 60614017645312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21354671041603) and next prime (21354671041609).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354671041603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42583680 + ... + 43082236.

It is an arithmetic number, because the mean of its divisors is an integer number (1552578413004).

Almost surely, 2^{21354671041606} is an apocalyptic number.

21354671041606 is a deficient number, since it is larger than the sum of its proper divisors (15907210870490).

21354671041606 is a wasteful number, since it uses less digits than its factorization.

21354671041606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935644 (or 935637 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

Adding to 21354671041606 its reverse (60614017645312), we get a palindrome (81968688686918).

The spelling of 21354671041606 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred seventy-one million, forty-one thousand, six hundred six".