20274224 has 40 divisors (see below), whose sum is σ = 42125280. Its totient is φ = 9427968.

The previous prime is 20274223. The next prime is 20274259. The reversal of 20274224 is 42247202.

It is a happy number.

It is a super-2 number, since 2×20274224² = 822088317604352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 20274224.

It is not an unprimeable number, because it can be changed into a prime (20274223) 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 7 ways as a sum of consecutive naturals, for example, 12872 + ... + 14360.

It is an arithmetic number, because the mean of its divisors is an integer number (1053132).

Almost surely, 2^20274224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20274224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21062640).

20274224 is an abundant number, since it is smaller than the sum of its proper divisors (21851056).

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

20274224 is a wasteful number, since it uses less digits than its factorization.

20274224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 20274224 is about 4502.6907510954. The cubic root of 20274224 is about 272.6767318601.

The spelling of 20274224 in words is "twenty million, two hundred seventy-four thousand, two hundred twenty-four".