20538670593 has 8 divisors (see below), whose sum is σ = 31297021888. Its totient is φ = 11736383184.

The previous prime is 20538670589. The next prime is 20538670613. The reversal of 20538670593 is 39507683502.

It is a happy number.

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

It is not a de Polignac number, because 20538670593 - 2² = 20538670589 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20538670553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489015946 + ... + 489015987.

It is an arithmetic number, because the mean of its divisors is an integer number (3912127736).

Almost surely, 2^20538670593 is an apocalyptic number.

It is an amenable number.

20538670593 is a deficient number, since it is larger than the sum of its proper divisors (10758351295).

20538670593 is an equidigital number, since it uses as much as digits as its factorization.

20538670593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978031943.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 20538670593 in words is "twenty billion, five hundred thirty-eight million, six hundred seventy thousand, five hundred ninety-three".