20045643046 has 16 divisors (see below), whose sum is σ = 35325189648. Its totient is φ = 8410759200.

The previous prime is 20045642971. The next prime is 20045643049. The reversal of 20045643046 is 64034654002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045643049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35044545 + ... + 35045116.

It is an arithmetic number, because the mean of its divisors is an integer number (2207824353).

Almost surely, 2^20045643046 is an apocalyptic number.

20045643046 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20045643046 is a deficient number, since it is larger than the sum of its proper divisors (15279546602).

20045643046 is a wasteful number, since it uses less digits than its factorization.

20045643046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70089687.

The product of its (nonzero) digits is 69120, while the sum is 34.

The spelling of 20045643046 in words is "twenty billion, forty-five million, six hundred forty-three thousand, forty-six".