20646054290 has 16 divisors (see below), whose sum is σ = 37164716568. Its totient is φ = 8258017536.

The previous prime is 20646054263. The next prime is 20646054293. The reversal of 20646054290 is 9245064602.

It can be written as a sum of positive squares in 4 ways, for example, as 18057178129 + 2588876161 = 134377^2 + 50881^2 .

It is not an unprimeable number, because it can be changed into a prime (20646054293) by changing a digit.

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, 248024 + ... + 320636.

Almost surely, 2^20646054290 is an apocalyptic number.

20646054290 is a deficient number, since it is larger than the sum of its proper divisors (16518662278).

20646054290 is a wasteful number, since it uses less digits than its factorization.

20646054290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101053.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 20646054290 in words is "twenty billion, six hundred forty-six million, fifty-four thousand, two hundred ninety".