20124642 has 32 divisors (see below), whose sum is σ = 41808384. Its totient is φ = 6451200.

The previous prime is 20124631. The next prime is 20124647. The reversal of 20124642 is 24642102.

It is not an unprimeable number, because it can be changed into a prime (20124647) 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, 47592 + ... + 48012.

It is an arithmetic number, because the mean of its divisors is an integer number (1306512).

Almost surely, 2^20124642 is an apocalyptic number.

20124642 is an abundant number, since it is smaller than the sum of its proper divisors (21683742).

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

20124642 is a wasteful number, since it uses less digits than its factorization.

20124642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20124642 is about 4486.0497099341. The cubic root of 20124642 is about 272.0044783721.

Adding to 20124642 its reverse (24642102), we get a palindrome (44766744).

The spelling of 20124642 in words is "twenty million, one hundred twenty-four thousand, six hundred forty-two".