20272466778 has 32 divisors (see below), whose sum is σ = 40650964800. Its totient is φ = 6739842816.

The previous prime is 20272466741. The next prime is 20272466783. The reversal of 20272466778 is 87766427202.

20272466778 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×20272466778² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20272466778.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4289925 + ... + 4294647.

It is an arithmetic number, because the mean of its divisors is an integer number (1270342650).

Almost surely, 2^20272466778 is an apocalyptic number.

20272466778 is an abundant number, since it is smaller than the sum of its proper divisors (20378498022).

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

20272466778 is a wasteful number, since it uses less digits than its factorization.

20272466778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6446.

The product of its (nonzero) digits is 3161088, while the sum is 51.

The spelling of 20272466778 in words is "twenty billion, two hundred seventy-two million, four hundred sixty-six thousand, seven hundred seventy-eight".