20456448261 has 16 divisors (see below), whose sum is σ = 27321827328. Its totient is φ = 13614375600.

The previous prime is 20456448227. The next prime is 20456448263. The reversal of 20456448261 is 16284465402.

It is a de Polignac number, because none of the positive numbers 2^k-20456448261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20456448263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6030876 + ... + 6034266.

It is an arithmetic number, because the mean of its divisors is an integer number (1707614208).

Almost surely, 2^20456448261 is an apocalyptic number.

It is an amenable number.

20456448261 is a deficient number, since it is larger than the sum of its proper divisors (6865379067).

20456448261 is a wasteful number, since it uses less digits than its factorization.

20456448261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232.

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 20456448261 in words is "twenty billion, four hundred fifty-six million, four hundred forty-eight thousand, two hundred sixty-one".