20071408 has 20 divisors (see below), whose sum is σ = 44444080. Its totient is φ = 8601984.

The previous prime is 20071367. The next prime is 20071409. The reversal of 20071408 is 80417002.

It is a super-2 number, since 2×20071408² = 805722838204928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20071409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89493 + ... + 89716.

It is an arithmetic number, because the mean of its divisors is an integer number (2222204).

Almost surely, 2^20071408 is an apocalyptic number.

20071408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20071408 is an abundant number, since it is smaller than the sum of its proper divisors (24372672).

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

20071408 is a wasteful number, since it uses less digits than its factorization.

20071408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179224 (or 179218 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20071408 is about 4480.1124985875. The cubic root of 20071408 is about 271.7644298341.

The spelling of 20071408 in words is "twenty million, seventy-one thousand, four hundred eight".