21055231414923 has 8 divisors (see below), whose sum is σ = 28109313607488. Its totient is φ = 14018985082824.

The previous prime is 21055231414901. The next prime is 21055231414961. The reversal of 21055231414923 is 32941413255012.

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

It is not a de Polignac number, because 21055231414923 - 2⁸ = 21055231414667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21055231414223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4458962361 + ... + 4458967082.

It is an arithmetic number, because the mean of its divisors is an integer number (3513664200936).

Almost surely, 2^{21055231414923} is an apocalyptic number.

21055231414923 is a deficient number, since it is larger than the sum of its proper divisors (7054082192565).

21055231414923 is an equidigital number, since it uses as much as digits as its factorization.

21055231414923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8917930233.

The product of its (nonzero) digits is 259200, while the sum is 42.

Adding to 21055231414923 its reverse (32941413255012), we get a palindrome (53996644669935).

The spelling of 21055231414923 in words is "twenty-one trillion, fifty-five billion, two hundred thirty-one million, four hundred fourteen thousand, nine hundred twenty-three".