20029563 has 12 divisors (see below), whose sum is σ = 29095560. Its totient is φ = 13277376.

The previous prime is 20029561. The next prime is 20029579. The reversal of 20029563 is 36592002.

It is not a de Polignac number, because 20029563 - 2¹ = 20029561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20029561) 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, 4606 + ... + 7827.

It is an arithmetic number, because the mean of its divisors is an integer number (2424630).

Almost surely, 2^20029563 is an apocalyptic number.

20029563 is a deficient number, since it is larger than the sum of its proper divisors (9065997).

20029563 is a wasteful number, since it uses less digits than its factorization.

20029563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12618 (or 12615 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20029563 is about 4475.4399783708. The cubic root of 20029563 is about 271.5754396957.

The spelling of 20029563 in words is "twenty million, twenty-nine thousand, five hundred sixty-three".