20217000783 has 16 divisors (see below), whose sum is σ = 31105957376. Its totient is φ = 11440409760.

The previous prime is 20217000767. The next prime is 20217000803. The reversal of 20217000783 is 38700071202.

It is not a de Polignac number, because 20217000783 - 2⁴ = 20217000767 is a prime.

It is a super-2 number, since 2×20217000783² (a number of 21 digits) contains 22 as substring.

It is the 142187-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20217000783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20217000283) by changing a digit.

It is a nontrivial repunit in base 142186.

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, 4671208 + ... + 4675533.

It is an arithmetic number, because the mean of its divisors is an integer number (1944122336).

Almost surely, 2^20217000783 is an apocalyptic number.

20217000783 is a deficient number, since it is larger than the sum of its proper divisors (10888956593).

20217000783 is a wasteful number, since it uses less digits than its factorization.

20217000783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9346854.

The product of its (nonzero) digits is 4704, while the sum is 30.

Adding to 20217000783 its reverse (38700071202), we get a palindrome (58917071985).

The spelling of 20217000783 in words is "twenty billion, two hundred seventeen million, seven hundred eighty-three", and thus it is an aban number.