20442408 has 48 divisors (see below), whose sum is σ = 59453280. Its totient is φ = 5840352.

The previous prime is 20442403. The next prime is 20442413. The reversal of 20442408 is 80424402.

It is an interprime number because it is at equal distance from previous prime (20442403) and next prime (20442413).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20442403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7516 + ... + 9867.

It is an arithmetic number, because the mean of its divisors is an integer number (1238610).

Almost surely, 2^20442408 is an apocalyptic number.

20442408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20442408 is an abundant number, since it is smaller than the sum of its proper divisors (39010872).

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

20442408 is a wasteful number, since it uses less digits than its factorization.

20442408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17406 (or 17395 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 20442408 is about 4521.3281234611. The cubic root of 20442408 is about 273.4286494202.

The spelling of 20442408 in words is "twenty million, four hundred forty-two thousand, four hundred eight".