21155324633414 has 8 divisors (see below), whose sum is σ = 31733191321128. Its totient is φ = 10577594193040.

The previous prime is 21155324633411. The next prime is 21155324633453. The reversal of 21155324633414 is 41433642355112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155324633411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33672767 + ... + 34295274.

It is an arithmetic number, because the mean of its divisors is an integer number (3966648915141).

Almost surely, 2^{21155324633414} is an apocalyptic number.

21155324633414 is a deficient number, since it is larger than the sum of its proper divisors (10577866687714).

21155324633414 is a wasteful number, since it uses less digits than its factorization.

21155324633414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68123670.

The product of its digits is 1036800, while the sum is 44.

Adding to 21155324633414 its reverse (41433642355112), we get a palindrome (62588966988526).

The spelling of 21155324633414 in words is "twenty-one trillion, one hundred fifty-five billion, three hundred twenty-four million, six hundred thirty-three thousand, four hundred fourteen".