20124356 has 24 divisors (see below), whose sum is σ = 42000000. Its totient is φ = 8249472.

The previous prime is 20124353. The next prime is 20124359. The reversal of 20124356 is 65342102.

It is an interprime number because it is at equal distance from previous prime (20124353) and next prime (20124359).

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

It is not an unprimeable number, because it can be changed into a prime (20124353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14981 + ... + 16268.

It is an arithmetic number, because the mean of its divisors is an integer number (1750000).

Almost surely, 2^20124356 is an apocalyptic number.

It is an amenable number.

20124356 is an abundant number, since it is smaller than the sum of its proper divisors (21875644).

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

20124356 is a wasteful number, since it uses less digits than its factorization.

20124356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31283 (or 31281 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20124356 is about 4486.0178332236. The cubic root of 20124356 is about 272.0031898415.

Adding to 20124356 its reverse (65342102), we get a palindrome (85466458).

The spelling of 20124356 in words is "twenty million, one hundred twenty-four thousand, three hundred fifty-six".