20723963 has 12 divisors (see below), whose sum is σ = 22618800. Its totient is φ = 18978336.

The previous prime is 20723939. The next prime is 20723999. The reversal of 20723963 is 36932702.

It is a happy number.

It is not a de Polignac number, because 20723963 - 2⁸ = 20723707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20723063) 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, 24770 + ... + 25592.

It is an arithmetic number, because the mean of its divisors is an integer number (1884900).

Almost surely, 2^20723963 is an apocalyptic number.

20723963 is a deficient number, since it is larger than the sum of its proper divisors (1894837).

20723963 is a wasteful number, since it uses less digits than its factorization.

20723963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 20723963 is about 4552.3579604420. The cubic root of 20723963 is about 274.6782484892.

The spelling of 20723963 in words is "twenty million, seven hundred twenty-three thousand, nine hundred sixty-three".