20423630 has 48 divisors (see below), whose sum is σ = 40317696. Its totient is φ = 7441920.

The previous prime is 20423621. The next prime is 20423639. The reversal of 20423630 is 3632402.

It is an interprime number because it is at equal distance from previous prime (20423621) and next prime (20423639).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106835 + ... + 107025.

It is an arithmetic number, because the mean of its divisors is an integer number (839952).

Almost surely, 2^20423630 is an apocalyptic number.

20423630 is a deficient number, since it is larger than the sum of its proper divisors (19894066).

20423630 is a wasteful number, since it uses less digits than its factorization.

20423630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20423630 is about 4519.2510441444. The cubic root of 20423630 is about 273.3449016850.

The spelling of 20423630 in words is "twenty million, four hundred twenty-three thousand, six hundred thirty".