22156546120 has 128 divisors (see below), whose sum is σ = 51911798400. Its totient is φ = 8505409536.

The previous prime is 22156546109. The next prime is 22156546121. The reversal of 22156546120 is 2164565122.

It is not an unprimeable number, because it can be changed into a prime (22156546121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38399272 + ... + 38399848.

It is an arithmetic number, because the mean of its divisors is an integer number (405560925).

Almost surely, 2^22156546120 is an apocalyptic number.

22156546120 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 22156546120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25955899200).

22156546120 is an abundant number, since it is smaller than the sum of its proper divisors (29755252280).

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

22156546120 is a wasteful number, since it uses less digits than its factorization.

22156546120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 22156546120 in words is "twenty-two billion, one hundred fifty-six million, five hundred forty-six thousand, one hundred twenty".