20444723 has 16 divisors (see below), whose sum is σ = 23236416. Its totient is φ = 17846400.

The previous prime is 20444719. The next prime is 20444729. The reversal of 20444723 is 32744402.

It is not a de Polignac number, because 20444723 - 2² = 20444719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20444692 and 20444701.

It is not an unprimeable number, because it can be changed into a prime (20444729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29861 + ... + 30537.

It is an arithmetic number, because the mean of its divisors is an integer number (1452276).

Almost surely, 2^20444723 is an apocalyptic number.

20444723 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20444723 is a deficient number, since it is larger than the sum of its proper divisors (2791693).

20444723 is a wasteful number, since it uses less digits than its factorization.

With its successor (20444724) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (814).

20444723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 20444723 is about 4521.5841250606. The cubic root of 20444723 is about 273.4389705042.

The spelling of 20444723 in words is "twenty million, four hundred forty-four thousand, seven hundred twenty-three".