21342124684497 has 16 divisors (see below), whose sum is σ = 28549907463168. Its totient is φ = 14181219702480.

The previous prime is 21342124684477. The next prime is 21342124684511. The reversal of 21342124684497 is 79448642124312.

It is not a de Polignac number, because 21342124684497 - 2¹⁹ = 21342124160209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21342124684477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11071918 + ... + 12855800.

It is an arithmetic number, because the mean of its divisors is an integer number (1784369216448).

Almost surely, 2^{21342124684497} is an apocalyptic number.

It is an amenable number.

21342124684497 is a deficient number, since it is larger than the sum of its proper divisors (7207782778671).

21342124684497 is a wasteful number, since it uses less digits than its factorization.

21342124684497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797020.

The product of its digits is 18579456, while the sum is 57.

The spelling of 21342124684497 in words is "twenty-one trillion, three hundred forty-two billion, one hundred twenty-four million, six hundred eighty-four thousand, four hundred ninety-seven".