20723000 has 128 divisors (see below), whose sum is σ = 54587520. Its totient is φ = 7321600.

The previous prime is 20722993. The next prime is 20723029. The reversal of 20723000 is 32702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390974 + ... + 391026.

It is an arithmetic number, because the mean of its divisors is an integer number (426465).

Almost surely, 2^20723000 is an apocalyptic number.

20723000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20723000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27293760).

20723000 is an abundant number, since it is smaller than the sum of its proper divisors (33864520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20723000 is a wasteful number, since it uses less digits than its factorization.

20723000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 20723000 is about 4552.2521898506. The cubic root of 20723000 is about 274.6739938452.

Adding to 20723000 its reverse (32702), we get a palindrome (20755702).

The spelling of 20723000 in words is "twenty million, seven hundred twenty-three thousand".