204620890786 has 16 divisors (see below), whose sum is σ = 330555960000. Its totient is φ = 94436262288.

The previous prime is 204620890757. The next prime is 204620890801. The reversal of 204620890786 is 687098026402.

It is a super-2 number, since 2×204620890786² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 476355 + ... + 797593.

It is an arithmetic number, because the mean of its divisors is an integer number (20659747500).

Almost surely, 2^204620890786 is an apocalyptic number.

204620890786 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

204620890786 is a deficient number, since it is larger than the sum of its proper divisors (125935069214).

204620890786 is a wasteful number, since it uses less digits than its factorization.

204620890786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345753.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 204620890786 in words is "two hundred four billion, six hundred twenty million, eight hundred ninety thousand, seven hundred eighty-six".