20424530 has 16 divisors (see below), whose sum is σ = 42016320. Its totient is φ = 7002672.

The previous prime is 20424517. The next prime is 20424533. The reversal of 20424530 is 3542402.

It is a super-2 number, since 2×20424530² = 834322851441800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20424533) 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, 145820 + ... + 145959.

It is an arithmetic number, because the mean of its divisors is an integer number (2626020).

Almost surely, 2^20424530 is an apocalyptic number.

20424530 is an abundant number, since it is smaller than the sum of its proper divisors (21591790).

20424530 is a wasteful number, since it uses less digits than its factorization.

20424530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291793.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20424530 is about 4519.3506170688. The cubic root of 20424530 is about 273.3489167531.

Adding to 20424530 its reverse (3542402), we get a palindrome (23966932).

The spelling of 20424530 in words is "twenty million, four hundred twenty-four thousand, five hundred thirty".