20002620 has 48 divisors (see below), whose sum is σ = 61100928. Its totient is φ = 4848960.

The previous prime is 20002613. The next prime is 20002639. The reversal of 20002620 is 2620002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20002596 and 20002605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14494 + ... + 15813.

It is an arithmetic number, because the mean of its divisors is an integer number (1272936).

Almost surely, 2^20002620 is an apocalyptic number.

20002620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002620 is an abundant number, since it is smaller than the sum of its proper divisors (41098308).

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

20002620 is a wasteful number, since it uses less digits than its factorization.

20002620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30330 (or 30328 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20002620 is about 4472.4288703120. The cubic root of 20002620 is about 271.4536140989.

Adding to 20002620 its reverse (2620002), we get a palindrome (22622622).

The spelling of 20002620 in words is "twenty million, two thousand, six hundred twenty".