21030123563460 has 288 divisors, whose sum is σ = 70630794823680. Its totient is φ = 5022298195200.

The previous prime is 21030123563441. The next prime is 21030123563489. The reversal of 21030123563460 is 6436532103012.

21030123563460 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 0 + 12 + 3 + 5 + 634 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 69142315 + ... + 69445805.

It is an arithmetic number, because the mean of its divisors is an integer number (245245815360).

Almost surely, 2^{21030123563460} is an apocalyptic number.

21030123563460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21030123563460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35315397411840).

21030123563460 is an abundant number, since it is smaller than the sum of its proper divisors (49600671260220).

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

21030123563460 is a wasteful number, since it uses less digits than its factorization.

21030123563460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304039 (or 304034 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 21030123563460 its reverse (6436532103012), we get a palindrome (27466655666472).

The spelling of 21030123563460 in words is "twenty-one trillion, thirty billion, one hundred twenty-three million, five hundred sixty-three thousand, four hundred sixty".