21430011544000 has 224 divisors, whose sum is σ = 53322908498496. Its totient is φ = 8531479756800.

The previous prime is 21430011543971. The next prime is 21430011544013. The reversal of 21430011544000 is 44511003412.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1544721064 + ... + 1544734936.

It is an arithmetic number, because the mean of its divisors is an integer number (238048698654).

Almost surely, 2^{21430011544000} is an apocalyptic number.

21430011544000 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 21430011544000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26661454249248).

21430011544000 is an abundant number, since it is smaller than the sum of its proper divisors (31892896954496).

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

21430011544000 is a wasteful number, since it uses less digits than its factorization.

21430011544000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14800 (or 14780 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21430011544000 its reverse (44511003412), we get a palindrome (21474522547412).

The spelling of 21430011544000 in words is "twenty-one trillion, four hundred thirty billion, eleven million, five hundred forty-four thousand".