20510758897 has 8 divisors (see below), whose sum is σ = 20612066472. Its totient is φ = 20409648000.

The previous prime is 20510758871. The next prime is 20510758937. The reversal of 20510758897 is 79885701502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5077417536 + 15433341361 = 71256^2 + 124231^2 .

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 20510758897 - 2²³ = 20502370289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20510758867) 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, 162147 + ... + 259447.

It is an arithmetic number, because the mean of its divisors is an integer number (2576508309).

Almost surely, 2^20510758897 is an apocalyptic number.

It is an amenable number.

20510758897 is a deficient number, since it is larger than the sum of its proper divisors (101307575).

20510758897 is an equidigital number, since it uses as much as digits as its factorization.

20510758897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98339.

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 20510758897 in words is "twenty billion, five hundred ten million, seven hundred fifty-eight thousand, eight hundred ninety-seven".