20612963 has 4 divisors (see below), whose sum is σ = 23557680. Its totient is φ = 17668248.

The previous prime is 20612957. The next prime is 20613029. The reversal of 20612963 is 36921602.

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 20612963 - 2⁴ = 20612947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20612903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1472348 + ... + 1472361.

It is an arithmetic number, because the mean of its divisors is an integer number (5889420).

Almost surely, 2^20612963 is an apocalyptic number.

20612963 is a deficient number, since it is larger than the sum of its proper divisors (2944717).

20612963 is an equidigital number, since it uses as much as digits as its factorization.

20612963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944716.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20612963 is about 4540.1501076506. The cubic root of 20612963 is about 274.1869672466.

The spelling of 20612963 in words is "twenty million, six hundred twelve thousand, nine hundred sixty-three".