20242620 has 36 divisors (see below), whose sum is σ = 61403160. Its totient is φ = 5397984.

The previous prime is 20242603. The next prime is 20242687. The reversal of 20242620 is 2624202.

It is a happy number.

20242620 is a `hidden beast` number, since 2 + 0 + 2 + 42 + 620 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20242593 and 20242602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56050 + ... + 56409.

Almost surely, 2^20242620 is an apocalyptic number.

20242620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20242620 is an abundant number, since it is smaller than the sum of its proper divisors (41160540).

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

20242620 is a wasteful number, since it uses less digits than its factorization.

20242620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112474 (or 112469 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20242620 is about 4499.1799252753. The cubic root of 20242620 is about 272.5349729263.

Adding to 20242620 its reverse (2624202), we get a palindrome (22866822).

The spelling of 20242620 in words is "twenty million, two hundred forty-two thousand, six hundred twenty".