22145051540 has 24 divisors (see below), whose sum is σ = 46573737000. Its totient is φ = 8844853248.

The previous prime is 22145051527. The next prime is 22145051573. The reversal of 22145051540 is 4515054122.

It can be written as a sum of positive squares in 4 ways, for example, as 136142224 + 22008909316 = 11668^2 + 148354^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809165 + ... + 836084.

It is an arithmetic number, because the mean of its divisors is an integer number (1940572375).

Almost surely, 2^22145051540 is an apocalyptic number.

22145051540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22145051540 is an abundant number, since it is smaller than the sum of its proper divisors (24428685460).

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

22145051540 is a wasteful number, since it uses less digits than its factorization.

22145051540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645931 (or 1645929 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 22145051540 in words is "twenty-two billion, one hundred forty-five million, fifty-one thousand, five hundred forty".