22051544243440 has 160 divisors (see below), whose sum is σ = 55844491348800. Its totient is φ = 8066017935360.

The previous prime is 22051544243429. The next prime is 22051544243473. The reversal of 22051544243440 is 4434244515022.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 22051544243393 and 22051544243402.

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, 165718374 + ... + 165851386.

It is an arithmetic number, because the mean of its divisors is an integer number (349028070930).

Almost surely, 2^{22051544243440} is an apocalyptic number.

22051544243440 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 22051544243440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27922245674400).

22051544243440 is an abundant number, since it is smaller than the sum of its proper divisors (33792947105360).

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

22051544243440 is a wasteful number, since it uses less digits than its factorization.

22051544243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136835 (or 136829 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 40.

Adding to 22051544243440 its reverse (4434244515022), we get a palindrome (26485788758462).

The spelling of 22051544243440 in words is "twenty-two trillion, fifty-one billion, five hundred forty-four million, two hundred forty-three thousand, four hundred forty".