21266231254 has 8 divisors (see below), whose sum is σ = 31907935440. Its totient is φ = 10630252776.

The previous prime is 21266231249. The next prime is 21266231257. The reversal of 21266231254 is 45213266212.

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 (21266231257) 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, 1422129 + ... + 1437004.

It is an arithmetic number, because the mean of its divisors is an integer number (3988491930).

Almost surely, 2^21266231254 is an apocalyptic number.

21266231254 is a deficient number, since it is larger than the sum of its proper divisors (10641704186).

21266231254 is a wasteful number, since it uses less digits than its factorization.

21266231254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862854.

The product of its digits is 34560, while the sum is 34.

Adding to 21266231254 its reverse (45213266212), we get a palindrome (66479497466).

The spelling of 21266231254 in words is "twenty-one billion, two hundred sixty-six million, two hundred thirty-one thousand, two hundred fifty-four".