21374332242015 has 48 divisors (see below), whose sum is σ = 36766667887488. Its totient is φ = 10599810415104.

The previous prime is 21374332241987. The next prime is 21374332242019. The reversal of 21374332242015 is 51024223347312.

It is not a de Polignac number, because 21374332242015 - 2¹³ = 21374332233823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374332242019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29342857 + ... + 30062466.

It is an arithmetic number, because the mean of its divisors is an integer number (765972247656).

Almost surely, 2^{21374332242015} is an apocalyptic number.

21374332242015 is a deficient number, since it is larger than the sum of its proper divisors (15392335645473).

21374332242015 is a wasteful number, since it uses less digits than its factorization.

21374332242015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59405448 (or 59405431 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

Adding to 21374332242015 its reverse (51024223347312), we get a palindrome (72398555589327).

The spelling of 21374332242015 in words is "twenty-one trillion, three hundred seventy-four billion, three hundred thirty-two million, two hundred forty-two thousand, fifteen".