20284736764 has 12 divisors (see below), whose sum is σ = 35757401904. Its totient is φ = 10068336224.

The previous prime is 20284736761. The next prime is 20284736837. The reversal of 20284736764 is 46763748202.

It is a super-2 number, since 2×20284736764² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284736761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18507424 + ... + 18508519.

It is an arithmetic number, because the mean of its divisors is an integer number (2979783492).

Almost surely, 2^20284736764 is an apocalyptic number.

It is an amenable number.

20284736764 is a deficient number, since it is larger than the sum of its proper divisors (15472665140).

20284736764 is a wasteful number, since it uses less digits than its factorization.

20284736764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37016084 (or 37016082 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 49.

The spelling of 20284736764 in words is "twenty billion, two hundred eighty-four million, seven hundred thirty-six thousand, seven hundred sixty-four".