20626900 has 72 divisors (see below), whose sum is σ = 51941120. Its totient is φ = 6963840.

The previous prime is 20626897. The next prime is 20626909. The reversal of 20626900 is 962602.

It is a super-2 number, since 2×20626900² = 850938007220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20626909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55114 + ... + 55486.

Almost surely, 2^20626900 is an apocalyptic number.

20626900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20626900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25970560).

20626900 is an abundant number, since it is smaller than the sum of its proper divisors (31314220).

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

20626900 is a wasteful number, since it uses less digits than its factorization.

20626900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20626900 is about 4541.6847094443. The cubic root of 20626900 is about 274.2487484802.

The spelling of 20626900 in words is "twenty million, six hundred twenty-six thousand, nine hundred".