21041323254 has 72 divisors (see below), whose sum is σ = 54988998480. Its totient is φ = 5695383456.

The previous prime is 21041323231. The next prime is 21041323279. The reversal of 21041323254 is 45232314012.

21041323254 is a `hidden beast` number, since 2 + 10 + 413 + 232 + 5 + 4 = 666.

It is a super-2 number, since 2×21041323254² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 185809 + ... + 276780.

It is an arithmetic number, because the mean of its divisors is an integer number (763736090).

Almost surely, 2^21041323254 is an apocalyptic number.

21041323254 is an abundant number, since it is smaller than the sum of its proper divisors (33947675226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21041323254 is a wasteful number, since it uses less digits than its factorization.

21041323254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462642 (or 462620 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 21041323254 its reverse (45232314012), we get a palindrome (66273637266).

The spelling of 21041323254 in words is "twenty-one billion, forty-one million, three hundred twenty-three thousand, two hundred fifty-four".