22031347905 has 60 divisors (see below), whose sum is σ = 44549848980. Its totient is φ = 10071423936.

The previous prime is 22031347903. The next prime is 22031347957. The reversal of 22031347905 is 50974313022.

22031347905 is a `hidden beast` number, since 220 + 3 + 1 + 347 + 90 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9186072336 + 12845275569 = 95844^2 + 113337^2 .

It is not a de Polignac number, because 22031347905 - 2¹ = 22031347903 is a prime.

It is a super-2 number, since 2×22031347905² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22031347905.

It is not an unprimeable number, because it can be changed into a prime (22031347903) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 6091 + ... + 209999.

It is an arithmetic number, because the mean of its divisors is an integer number (742497483).

Almost surely, 2^22031347905 is an apocalyptic number.

It is an amenable number.

22031347905 is an abundant number, since it is smaller than the sum of its proper divisors (22518501075).

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

22031347905 is an equidigital number, since it uses as much as digits as its factorization.

22031347905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203948 (or 203924 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 22031347905 in words is "twenty-two billion, thirty-one million, three hundred forty-seven thousand, nine hundred five".