20516525263 has 4 divisors (see below), whose sum is σ = 22094719528. Its totient is φ = 18938331000.

The previous prime is 20516525231. The next prime is 20516525273. The reversal of 20516525263 is 36252561502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20516525263 - 2⁵ = 20516525231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516525273) 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, 789097113 + ... + 789097138.

It is an arithmetic number, because the mean of its divisors is an integer number (5523679882).

Almost surely, 2^20516525263 is an apocalyptic number.

20516525263 is a deficient number, since it is larger than the sum of its proper divisors (1578194265).

20516525263 is a wasteful number, since it uses less digits than its factorization.

20516525263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578194264.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 20516525263 in words is "twenty billion, five hundred sixteen million, five hundred twenty-five thousand, two hundred sixty-three".