20626830 has 96 divisors (see below), whose sum is σ = 63460800. Its totient is φ = 4548096.

The previous prime is 20626789. The next prime is 20626841. The reversal of 20626830 is 3862602.

20626830 is a `hidden beast` number, since 2 + 0 + 626 + 8 + 30 = 666.

It is a super-2 number, since 2×20626830² = 850932231697800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20626794 and 20626803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17706 + ... + 18834.

It is an arithmetic number, because the mean of its divisors is an integer number (661050).

Almost surely, 2^20626830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20626830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31730400).

20626830 is an abundant number, since it is smaller than the sum of its proper divisors (42833970).

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

20626830 is a wasteful number, since it uses less digits than its factorization.

20626830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1175 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20626830 is about 4541.6770030463. The cubic root of 20626830 is about 274.2484382472.

The spelling of 20626830 in words is "twenty million, six hundred twenty-six thousand, eight hundred thirty".