20630700 has 126 divisors (see below), whose sum is σ = 67359404. Its totient is φ = 5482080.

The previous prime is 20630699. The next prime is 20630711. The reversal of 20630700 is 703602.

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

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 41 ways as a sum of consecutive naturals, for example, 72759 + ... + 73041.

Almost surely, 2^20630700 is an apocalyptic number.

20630700 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 20630700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33679702).

20630700 is an abundant number, since it is smaller than the sum of its proper divisors (46728704).

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

20630700 is a wasteful number, since it uses less digits than its factorization.

20630700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20630700 is about 4542.1030371404. The cubic root of 20630700 is about 274.2655886461.

The spelling of 20630700 in words is "twenty million, six hundred thirty thousand, seven hundred".