21425637234000 has 320 divisors, whose sum is σ = 74695741166592. Its totient is φ = 5263000576000.

The previous prime is 21425637233989. The next prime is 21425637234083. The reversal of 21425637234000 is 43273652412.

It is a self number, because there is not a number n which added to its sum of digits gives 21425637234000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2559370 + ... + 7028630.

Almost surely, 2^{21425637234000} is an apocalyptic number.

21425637234000 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 21425637234000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37347870583296).

21425637234000 is an abundant number, since it is smaller than the sum of its proper divisors (53270103932592).

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

21425637234000 is a wasteful number, since it uses less digits than its factorization.

21425637234000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4469351 (or 4469335 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

The spelling of 21425637234000 in words is "twenty-one trillion, four hundred twenty-five billion, six hundred thirty-seven million, two hundred thirty-four thousand".