20249418 has 32 divisors (see below), whose sum is σ = 46577664. Its totient is φ = 5748912.

The previous prime is 20249399. The next prime is 20249419. The reversal of 20249418 is 81494202.

It is not an unprimeable number, because it can be changed into a prime (20249419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5571 + ... + 8457.

It is an arithmetic number, because the mean of its divisors is an integer number (1455552).

Almost surely, 2^20249418 is an apocalyptic number.

20249418 is an abundant number, since it is smaller than the sum of its proper divisors (26328246).

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

20249418 is a wasteful number, since it uses less digits than its factorization.

20249418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3066.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20249418 is about 4499.9353328687. The cubic root of 20249418 is about 272.5654776302.

The spelling of 20249418 in words is "twenty million, two hundred forty-nine thousand, four hundred eighteen".