20723606 has 16 divisors (see below), whose sum is σ = 31739904. Its totient is φ = 10146024.

The previous prime is 20723581. The next prime is 20723609. The reversal of 20723606 is 60632702.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20723609) 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, 20591 + ... + 21573.

It is an arithmetic number, because the mean of its divisors is an integer number (1983744).

Almost surely, 2^20723606 is an apocalyptic number.

20723606 is a deficient number, since it is larger than the sum of its proper divisors (11016298).

20723606 is a wasteful number, since it uses less digits than its factorization.

20723606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20723606 is about 4552.3187498241. The cubic root of 20723606 is about 274.6766712378.

The spelling of 20723606 in words is "twenty million, seven hundred twenty-three thousand, six hundred six".