20712963 has 4 divisors (see below), whose sum is σ = 27617288. Its totient is φ = 13808640.

The previous prime is 20712917. The next prime is 20712973. The reversal of 20712963 is 36921702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20712963 - 2⁸ = 20712707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20712963.

It is not an unprimeable number, because it can be changed into a prime (20712973) 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, 3452158 + ... + 3452163.

It is an arithmetic number, because the mean of its divisors is an integer number (6904322).

Almost surely, 2^20712963 is an apocalyptic number.

20712963 is a deficient number, since it is larger than the sum of its proper divisors (6904325).

20712963 is an equidigital number, since it uses as much as digits as its factorization.

20712963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6904324.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20712963 is about 4551.1496349824. The cubic root of 20712963 is about 274.6296413852.

The spelling of 20712963 in words is "twenty million, seven hundred twelve thousand, nine hundred sixty-three".