20633858484778 has 32 divisors (see below), whose sum is σ = 38590272668160. Its totient is φ = 8038691147760.

The previous prime is 20633858484683. The next prime is 20633858484779. The reversal of 20633858484778 is 87748485833602.

It is a happy number.

It is a super-2 number, since 2×20633858484778² (a number of 27 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 20633858484778.

It is not an unprimeable number, because it can be changed into a prime (20633858484779) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1330876 + ... + 6560407.

It is an arithmetic number, because the mean of its divisors is an integer number (1205946020880).

Almost surely, 2^{20633858484778} is an apocalyptic number.

20633858484778 is a deficient number, since it is larger than the sum of its proper divisors (17956414183382).

20633858484778 is a wasteful number, since it uses less digits than its factorization.

20633858484778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7908282.

The product of its (nonzero) digits is 1734082560, while the sum is 73.

The spelling of 20633858484778 in words is "twenty trillion, six hundred thirty-three billion, eight hundred fifty-eight million, four hundred eighty-four thousand, seven hundred seventy-eight".