22154742740 has 48 divisors (see below), whose sum is σ = 50178647568. Its totient is φ = 8167993344.

The previous prime is 22154742707. The next prime is 22154742749. The reversal of 22154742740 is 4724745122.

It can be written as a sum of positive squares in 8 ways, for example, as 7429405636 + 14725337104 = 86194^2 + 121348^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22154742694 and 22154742703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22154742749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111674 + ... + 238286.

It is an arithmetic number, because the mean of its divisors is an integer number (1045388491).

Almost surely, 2^22154742740 is an apocalyptic number.

22154742740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22154742740 is an abundant number, since it is smaller than the sum of its proper divisors (28023904828).

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

22154742740 is a wasteful number, since it uses less digits than its factorization.

22154742740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127308 (or 127306 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 38.

The spelling of 22154742740 in words is "twenty-two billion, one hundred fifty-four million, seven hundred forty-two thousand, seven hundred forty".