20152663 has 4 divisors (see below), whose sum is σ = 20407840. Its totient is φ = 19897488.

The previous prime is 20152621. The next prime is 20152703. The reversal of 20152663 is 36625102.

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 20152663 - 2¹³ = 20144471 is a prime.

It is a super-2 number, since 2×20152663² = 812259651983138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152603) 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, 127470 + ... + 127627.

It is an arithmetic number, because the mean of its divisors is an integer number (5101960).

Almost surely, 2^20152663 is an apocalyptic number.

20152663 is a deficient number, since it is larger than the sum of its proper divisors (255177).

20152663 is an equidigital number, since it uses as much as digits as its factorization.

20152663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255176.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20152663 is about 4489.1717498888. The cubic root of 20152663 is about 272.1306636850.

Adding to 20152663 its reverse (36625102), we get a palindrome (56777765).

The spelling of 20152663 in words is "twenty million, one hundred fifty-two thousand, six hundred sixty-three".