20229723 has 8 divisors (see below), whose sum is σ = 29970000. Its totient is φ = 13486464.

The previous prime is 20229721. The next prime is 20229731. The reversal of 20229723 is 32792202.

It is not a de Polignac number, because 20229723 - 2¹ = 20229721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 749249 = 20229723 / (2 + 0 + 2 + 2 + 9 + 7 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (20229721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374598 + ... + 374651.

It is an arithmetic number, because the mean of its divisors is an integer number (3746250).

Almost surely, 2^20229723 is an apocalyptic number.

20229723 is a deficient number, since it is larger than the sum of its proper divisors (9740277).

20229723 is an equidigital number, since it uses as much as digits as its factorization.

20229723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749258 (or 749252 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20229723 is about 4497.7464357164. The cubic root of 20229723 is about 272.4770813707.

The spelling of 20229723 in words is "twenty million, two hundred twenty-nine thousand, seven hundred twenty-three".