20446830 has 40 divisors (see below), whose sum is σ = 54981432. Its totient is φ = 5452272.

The previous prime is 20446813. The next prime is 20446837. The reversal of 20446830 is 3864402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20446794 and 20446803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20446837) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11812 + ... + 13431.

Almost surely, 2^20446830 is an apocalyptic number.

20446830 is an abundant number, since it is smaller than the sum of its proper divisors (34534602).

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

20446830 is a wasteful number, since it uses less digits than its factorization.

20446830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25262 (or 25253 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20446830 is about 4521.8171126219. The cubic root of 20446830 is about 273.4483635738.

The spelling of 20446830 in words is "twenty million, four hundred forty-six thousand, eight hundred thirty".