20691063503 has 8 divisors (see below), whose sum is σ = 22575308160. Its totient is φ = 18807358680.

The previous prime is 20691063499. The next prime is 20691063509. The reversal of 20691063503 is 30536019602.

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

It is not a de Polignac number, because 20691063503 - 2² = 20691063499 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 (20691063509) 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, 52625 + ... + 210122.

It is an arithmetic number, because the mean of its divisors is an integer number (2821913520).

Almost surely, 2^20691063503 is an apocalyptic number.

20691063503 is a deficient number, since it is larger than the sum of its proper divisors (1884244657).

20691063503 is a wasteful number, since it uses less digits than its factorization.

20691063503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269917.

The product of its (nonzero) digits is 29160, while the sum is 35.

The spelling of 20691063503 in words is "twenty billion, six hundred ninety-one million, sixty-three thousand, five hundred three".