20265410587 has 8 divisors (see below), whose sum is σ = 20770137360. Its totient is φ = 19761181440.

The previous prime is 20265410573. The next prime is 20265410591. The reversal of 20265410587 is 78501456202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20265410587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20265410527) 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, 41262 + ... + 205507.

It is an arithmetic number, because the mean of its divisors is an integer number (2596267170).

Almost surely, 2^20265410587 is an apocalyptic number.

20265410587 is a deficient number, since it is larger than the sum of its proper divisors (504726773).

20265410587 is a wasteful number, since it uses less digits than its factorization.

20265410587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248813.

The product of its (nonzero) digits is 134400, while the sum is 40.

Adding to 20265410587 its reverse (78501456202), we get a palindrome (98766866789).

The spelling of 20265410587 in words is "twenty billion, two hundred sixty-five million, four hundred ten thousand, five hundred eighty-seven".