20432623 has 4 divisors (see below), whose sum is σ = 21634560. Its totient is φ = 19230688.

The previous prime is 20432609. The next prime is 20432663. The reversal of 20432623 is 32623402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20432623 - 2¹³ = 20424431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20432594 and 20432603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600943 + ... + 600976.

It is an arithmetic number, because the mean of its divisors is an integer number (5408640).

Almost surely, 2^20432623 is an apocalyptic number.

20432623 is a deficient number, since it is larger than the sum of its proper divisors (1201937).

20432623 is a wasteful number, since it uses less digits than its factorization.

20432623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201936.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 20432623 is about 4520.2459003908. The cubic root of 20432623 is about 273.3850158402.

The spelling of 20432623 in words is "twenty million, four hundred thirty-two thousand, six hundred twenty-three".