20457381789 has 40 divisors (see below), whose sum is σ = 33008775800. Its totient is φ = 12551583744.

The previous prime is 20457381787. The next prime is 20457381793. The reversal of 20457381789 is 98718375402.

It is a happy number.

20457381789 is a `hidden beast` number, since 204 + 57 + 381 + 7 + 8 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3731132889 + 16726248900 = 61083^2 + 129330^2 .

It is not a de Polignac number, because 20457381789 - 2¹ = 20457381787 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20457381787) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 326037 + ... + 383685.

It is an arithmetic number, because the mean of its divisors is an integer number (825219395).

Almost surely, 2^20457381789 is an apocalyptic number.

It is an amenable number.

20457381789 is a deficient number, since it is larger than the sum of its proper divisors (12551394011).

20457381789 is a wasteful number, since it uses less digits than its factorization.

20457381789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58011 (or 58002 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 20457381789 in words is "twenty billion, four hundred fifty-seven million, three hundred eighty-one thousand, seven hundred eighty-nine".