21972436047600 has 240 divisors, whose sum is σ = 72697468207104. Its totient is φ = 5667032448000.

The previous prime is 21972436047599. The next prime is 21972436047643. The reversal of 21972436047600 is 674063427912.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64595569 + ... + 64934831.

Almost surely, 2^{21972436047600} is an apocalyptic number.

21972436047600 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 21972436047600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36348734103552).

21972436047600 is an abundant number, since it is smaller than the sum of its proper divisors (50725032159504).

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

21972436047600 is a wasteful number, since it uses less digits than its factorization.

21972436047600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341056 (or 341045 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 21972436047600 in words is "twenty-one trillion, nine hundred seventy-two billion, four hundred thirty-six million, forty-seven thousand, six hundred".