22720033145 has 16 divisors (see below), whose sum is σ = 28299048960. Its totient is φ = 17492500800.

The previous prime is 22720033117. The next prime is 22720033153. The reversal of 22720033145 is 54133002722.

It is a de Polignac number, because none of the positive numbers 2^k-22720033145 is a prime.

It is a super-2 number, since 2×22720033145² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376865 + ... + 432974.

It is an arithmetic number, because the mean of its divisors is an integer number (1768690560).

Almost surely, 2^22720033145 is an apocalyptic number.

It is an amenable number.

22720033145 is a deficient number, since it is larger than the sum of its proper divisors (5579015815).

22720033145 is a wasteful number, since it uses less digits than its factorization.

22720033145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810056.

The product of its (nonzero) digits is 10080, while the sum is 29.

Adding to 22720033145 its reverse (54133002722), we get a palindrome (76853035867).

The spelling of 22720033145 in words is "twenty-two billion, seven hundred twenty million, thirty-three thousand, one hundred forty-five".