20516661502 has 8 divisors (see below), whose sum is σ = 30784197096. Its totient is φ = 10255262472.

The previous prime is 20516661481. The next prime is 20516661527.

20516661502 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525773 + ... + 1539160.

It is an arithmetic number, because the mean of its divisors is an integer number (3848024637).

Almost surely, 2^20516661502 is an apocalyptic number.

20516661502 is a deficient number, since it is larger than the sum of its proper divisors (10267535594).

20516661502 is a wasteful number, since it uses less digits than its factorization.

20516661502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068282.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 20516661502 in words is "twenty billion, five hundred sixteen million, six hundred sixty-one thousand, five hundred two".