20451265741 has 8 divisors (see below), whose sum is σ = 21400914240. Its totient is φ = 19506655872.

The previous prime is 20451265739. The next prime is 20451265753. The reversal of 20451265741 is 14756215402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20451265741 - 2¹ = 20451265739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20451265741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451265721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251351 + ... + 1267588.

It is an arithmetic number, because the mean of its divisors is an integer number (2675114280).

Almost surely, 2^20451265741 is an apocalyptic number.

It is an amenable number.

20451265741 is a deficient number, since it is larger than the sum of its proper divisors (949648499).

20451265741 is a wasteful number, since it uses less digits than its factorization.

20451265741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519315.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 20451265741 in words is "twenty billion, four hundred fifty-one million, two hundred sixty-five thousand, seven hundred forty-one".