20450388 has 48 divisors (see below), whose sum is σ = 57746304. Its totient is φ = 5498880.

The previous prime is 20450377. The next prime is 20450389. The reversal of 20450388 is 88305402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450389) 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, 5733 + ... + 8588.

It is an arithmetic number, because the mean of its divisors is an integer number (1203048).

Almost surely, 2^20450388 is an apocalyptic number.

20450388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20450388 is an abundant number, since it is smaller than the sum of its proper divisors (37295916).

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

20450388 is a wasteful number, since it uses less digits than its factorization.

20450388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14352 (or 14350 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20450388 is about 4522.2105214154. The cubic root of 20450388 is about 273.4642237805.

The spelling of 20450388 in words is "twenty million, four hundred fifty thousand, three hundred eighty-eight".