20466623 has 4 divisors (see below), whose sum is σ = 21670560. Its totient is φ = 19262688.

The previous prime is 20466617. The next prime is 20466631. The reversal of 20466623 is 32666402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32666402 = 2 ⋅16333201.

It is a cyclic number.

It is not a de Polignac number, because 20466623 - 2¹⁴ = 20450239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20466613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601943 + ... + 601976.

It is an arithmetic number, because the mean of its divisors is an integer number (5417640).

Almost surely, 2^20466623 is an apocalyptic number.

20466623 is a deficient number, since it is larger than the sum of its proper divisors (1203937).

20466623 is a wasteful number, since it uses less digits than its factorization.

20466623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203936.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 20466623 is about 4524.0051945151. The cubic root of 20466623 is about 273.5365698788.

The spelling of 20466623 in words is "twenty million, four hundred sixty-six thousand, six hundred twenty-three".