20416320285 has 16 divisors (see below), whose sum is σ = 32989541760. Its totient is φ = 10780894400.

The previous prime is 20416320251. The next prime is 20416320311. The reversal of 20416320285 is 58202361402.

It is not a de Polignac number, because 20416320285 - 2⁹ = 20416319773 is a prime.

It is a super-2 number, since 2×20416320285² (a number of 21 digits) contains 22 as substring.

It is a congruent 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, 6736545 + ... + 6739574.

It is an arithmetic number, because the mean of its divisors is an integer number (2061846360).

Almost surely, 2^20416320285 is an apocalyptic number.

It is an amenable number.

20416320285 is a deficient number, since it is larger than the sum of its proper divisors (12573221475).

20416320285 is a wasteful number, since it uses less digits than its factorization.

20416320285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13476228.

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 20416320285 its reverse (58202361402), we get a palindrome (78618681687).

The spelling of 20416320285 in words is "twenty billion, four hundred sixteen million, three hundred twenty thousand, two hundred eighty-five".