20723046 has 24 divisors (see below), whose sum is σ = 43333080. Its totient is φ = 6606336.

The previous prime is 20723041. The next prime is 20723047. The reversal of 20723046 is 64032702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20723041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91 + ... + 6438.

It is an arithmetic number, because the mean of its divisors is an integer number (1805545).

Almost surely, 2^20723046 is an apocalyptic number.

20723046 is an abundant number, since it is smaller than the sum of its proper divisors (22610034).

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

20723046 is a wasteful number, since it uses less digits than its factorization.

20723046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6580 (or 6557 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20723046 is about 4552.2572422920. The cubic root of 20723046 is about 274.6741970815.

Adding to 20723046 its reverse (64032702), we get a palindrome (84755748).

The spelling of 20723046 in words is "twenty million, seven hundred twenty-three thousand, forty-six".