20465830 has 48 divisors (see below), whose sum is σ = 46760976. Its totient is φ = 6377280.

The previous prime is 20465827. The next prime is 20465833. The reversal of 20465830 is 3856402.

It is an interprime number because it is at equal distance from previous prime (20465827) and next prime (20465833).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465833) 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, 3492 + ... + 7288.

It is an arithmetic number, because the mean of its divisors is an integer number (974187).

Almost surely, 2^20465830 is an apocalyptic number.

20465830 is an abundant number, since it is smaller than the sum of its proper divisors (26295146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20465830 is a wasteful number, since it uses less digits than its factorization.

20465830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829 (or 3822 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20465830 is about 4523.9175500886. The cubic root of 20465830 is about 273.5330370162.

The spelling of 20465830 in words is "twenty million, four hundred sixty-five thousand, eight hundred thirty".