20660463 has 12 divisors (see below), whose sum is σ = 31140720. Its totient is φ = 13174656.

The previous prime is 20660399. The next prime is 20660473. The reversal of 20660463 is 36406602.

It is not a de Polignac number, because 20660463 - 2⁶ = 20660399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49698 + ... + 50111.

It is an arithmetic number, because the mean of its divisors is an integer number (2595060).

Almost surely, 2^20660463 is an apocalyptic number.

20660463 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20660463 is a deficient number, since it is larger than the sum of its proper divisors (10480257).

20660463 is a wasteful number, since it uses less digits than its factorization.

20660463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99838 (or 99835 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 20660463 is about 4545.3782020862. The cubic root of 20660463 is about 274.3974155579.

The spelling of 20660463 in words is "twenty million, six hundred sixty thousand, four hundred sixty-three".