20894554741 has 4 divisors (see below), whose sum is σ = 20896375500. Its totient is φ = 20892733984.

The previous prime is 20894554717. The next prime is 20894554763. The reversal of 20894554741 is 14745549802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10557562500 + 10336992241 = 102750^2 + 101671^2 .

It is a cyclic number.

It is not a de Polignac number, because 20894554741 - 2⁹ = 20894554229 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20894554141) 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, 893056 + ... + 916153.

It is an arithmetic number, because the mean of its divisors is an integer number (5224093875).

Almost surely, 2^20894554741 is an apocalyptic number.

It is an amenable number.

20894554741 is a deficient number, since it is larger than the sum of its proper divisors (1820759).

20894554741 is a wasteful number, since it uses less digits than its factorization.

20894554741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820758.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 20894554741 in words is "twenty billion, eight hundred ninety-four million, five hundred fifty-four thousand, seven hundred forty-one".