20423488 has 14 divisors (see below), whose sum is σ = 40527986. Its totient is φ = 10211712.

The previous prime is 20423483. The next prime is 20423489. The reversal of 20423488 is 88432402.

It can be written as a sum of positive squares in only one way, i.e., 11614464 + 8809024 = 3408^2 + 2968^2 .

It is a super-2 number, since 2×20423488² = 834237724172288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159495 + ... + 159622.

Almost surely, 2^20423488 is an apocalyptic number.

It is an amenable number.

20423488 is a deficient number, since it is larger than the sum of its proper divisors (20104498).

20423488 is an equidigital number, since it uses as much as digits as its factorization.

20423488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319129 (or 319119 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 20423488 is about 4519.2353335492. The cubic root of 20423488 is about 273.3442681857.

The spelling of 20423488 in words is "twenty million, four hundred twenty-three thousand, four hundred eighty-eight".