20142624 has 24 divisors (see below), whose sum is σ = 52874640. Its totient is φ = 6714176.

The previous prime is 20142613. The next prime is 20142673. The reversal of 20142624 is 42624102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20142624.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104814 + ... + 105005.

It is an arithmetic number, because the mean of its divisors is an integer number (2203110).

Almost surely, 2^20142624 is an apocalyptic number.

20142624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20142624 is an abundant number, since it is smaller than the sum of its proper divisors (32732016).

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

20142624 is a wasteful number, since it uses less digits than its factorization.

20142624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209832 (or 209824 counting only the distinct ones).

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

The square root of 20142624 is about 4488.0534756172. The cubic root of 20142624 is about 272.0854691038.

Adding to 20142624 its reverse (42624102), we get a palindrome (62766726).

The spelling of 20142624 in words is "twenty million, one hundred forty-two thousand, six hundred twenty-four".