20423756 has 12 divisors (see below), whose sum is σ = 36502368. Its totient is φ = 9994512.

The previous prime is 20423719. The next prime is 20423771. The reversal of 20423756 is 65732402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54131 + ... + 54506.

It is an arithmetic number, because the mean of its divisors is an integer number (3041864).

Almost surely, 2^20423756 is an apocalyptic number.

It is an amenable number.

20423756 is a deficient number, since it is larger than the sum of its proper divisors (16078612).

20423756 is a wasteful number, since it uses less digits than its factorization.

20423756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108688 (or 108686 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 20423756 is about 4519.2649844859. The cubic root of 20423756 is about 273.3454638017.

The spelling of 20423756 in words is "twenty million, four hundred twenty-three thousand, seven hundred fifty-six".