22151427440 has 80 divisors (see below), whose sum is σ = 52439670432. Its totient is φ = 8700122112.

The previous prime is 22151427439. The next prime is 22151427523. The reversal of 22151427440 is 4472415122.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 22151427397 and 22151427406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1692602 + ... + 1705638.

Almost surely, 2^22151427440 is an apocalyptic number.

22151427440 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 22151427440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26219835216).

22151427440 is an abundant number, since it is smaller than the sum of its proper divisors (30288242992).

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

22151427440 is a wasteful number, since it uses less digits than its factorization.

22151427440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13434 (or 13428 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The spelling of 22151427440 in words is "twenty-two billion, one hundred fifty-one million, four hundred twenty-seven thousand, four hundred forty".