20224911 has 32 divisors (see below), whose sum is σ = 32739840. Its totient is φ = 10848384.

The previous prime is 20224909. The next prime is 20224937. The reversal of 20224911 is 11942202.

It is not a de Polignac number, because 20224911 - 2¹ = 20224909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20224901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68881 + ... + 69173.

It is an arithmetic number, because the mean of its divisors is an integer number (1023120).

Almost surely, 2^20224911 is an apocalyptic number.

20224911 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20224911 is a deficient number, since it is larger than the sum of its proper divisors (12514929).

20224911 is a wasteful number, since it uses less digits than its factorization.

20224911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20224911 is about 4497.2114693441. The cubic root of 20224911 is about 272.4554751482.

The spelling of 20224911 in words is "twenty million, two hundred twenty-four thousand, nine hundred eleven".