21423104210040 has 128 divisors (see below), whose sum is σ = 72222371504640. Its totient is φ = 5044102119936.

The previous prime is 21423104209993. The next prime is 21423104210111. The reversal of 21423104210040 is 4001240132412.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 298502362 + ... + 298574121.

It is an arithmetic number, because the mean of its divisors is an integer number (564237277380).

Almost surely, 2^{21423104210040} is an apocalyptic number.

21423104210040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21423104210040 is an abundant number, since it is smaller than the sum of its proper divisors (50799267294600).

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

21423104210040 is a wasteful number, since it uses less digits than its factorization.

21423104210040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597076533 (or 597076529 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21423104210040 its reverse (4001240132412), we get a palindrome (25424344342452).

The spelling of 21423104210040 in words is "twenty-one trillion, four hundred twenty-three billion, one hundred four million, two hundred ten thousand, forty".