23778220636 has 24 divisors (see below), whose sum is σ = 43095822336. Its totient is φ = 11472254640.

The previous prime is 23778220621. The next prime is 23778220639. The reversal of 23778220636 is 63602287732.

It is a super-2 number, since 2×23778220636² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23778220639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877356 + ... + 904051.

It is an arithmetic number, because the mean of its divisors is an integer number (1795659264).

Almost surely, 2^23778220636 is an apocalyptic number.

It is an amenable number.

23778220636 is a deficient number, since it is larger than the sum of its proper divisors (19317601700).

23778220636 is a wasteful number, since it uses less digits than its factorization.

23778220636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781529 (or 1781527 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 46.

The spelling of 23778220636 in words is "twenty-three billion, seven hundred seventy-eight million, two hundred twenty thousand, six hundred thirty-six".