20740963 has 4 divisors (see below), whose sum is σ = 21642768. Its totient is φ = 19839160.

The previous prime is 20740939. The next prime is 20740981. The reversal of 20740963 is 36904702.

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 20740963 - 2⁵ = 20740931 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20740903) 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, 450868 + ... + 450913.

It is an arithmetic number, because the mean of its divisors is an integer number (5410692).

Almost surely, 2^20740963 is an apocalyptic number.

20740963 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20740963 is a deficient number, since it is larger than the sum of its proper divisors (901805).

20740963 is an equidigital number, since it uses as much as digits as its factorization.

20740963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901804.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 20740963 is about 4554.2247419292. The cubic root of 20740963 is about 274.7533347390.

The spelling of 20740963 in words is "twenty million, seven hundred forty thousand, nine hundred sixty-three".