20449430 has 8 divisors (see below), whose sum is σ = 36808992. Its totient is φ = 8179768.

The previous prime is 20449421. The next prime is 20449433. The reversal of 20449430 is 3494402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20449430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20449433) 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, 1022462 + ... + 1022481.

It is an arithmetic number, because the mean of its divisors is an integer number (4601124).

Almost surely, 2^20449430 is an apocalyptic number.

20449430 is a deficient number, since it is larger than the sum of its proper divisors (16359562).

20449430 is a wasteful number, since it uses less digits than its factorization.

20449430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044950.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20449430 is about 4522.1045985249. The cubic root of 20449430 is about 273.4599535630.

The spelling of 20449430 in words is "twenty million, four hundred forty-nine thousand, four hundred thirty".