21014425335420 has 480 divisors, whose sum is σ = 73674764545536. Its totient is φ = 4970098828800.

The previous prime is 21014425335383. The next prime is 21014425335427. The reversal of 21014425335420 is 2453352441012.

It is a happy number.

21014425335420 is a `hidden beast` number, since 2 + 1 + 0 + 14 + 42 + 533 + 54 + 20 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014425335427) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 671994385 + ... + 672025655.

Almost surely, 2^{21014425335420} is an apocalyptic number.

21014425335420 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 21014425335420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36837382272768).

21014425335420 is an abundant number, since it is smaller than the sum of its proper divisors (52660339210116).

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

21014425335420 is a wasteful number, since it uses less digits than its factorization.

21014425335420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32223 (or 32212 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 21014425335420 its reverse (2453352441012), we get a palindrome (23467777776432).

It can be divided in two parts, 21014425 and 335420, that added together give a triangular number (21349845 = T₆₅₃₄).

The spelling of 21014425335420 in words is "twenty-one trillion, fourteen billion, four hundred twenty-five million, three hundred thirty-five thousand, four hundred twenty".