20457963506 has 8 divisors (see below), whose sum is σ = 32492059740. Its totient is φ = 9627276928.

The previous prime is 20457963497. The next prime is 20457963509. The reversal of 20457963506 is 60536975402.

It can be written as a sum of positive squares in 2 ways, for example, as 19955800225 + 502163281 = 141265^2 + 22409^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20457963509) 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, 300852371 + ... + 300852438.

Almost surely, 2^20457963506 is an apocalyptic number.

20457963506 is a deficient number, since it is larger than the sum of its proper divisors (12034096234).

20457963506 is a wasteful number, since it uses less digits than its factorization.

20457963506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601704828.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 20457963506 in words is "twenty billion, four hundred fifty-seven million, nine hundred sixty-three thousand, five hundred six".