20670700 has 36 divisors (see below), whose sum is σ = 45339112. Its totient is φ = 8179200.

The previous prime is 20670673. The next prime is 20670701. The reversal of 20670700 is 707602.

It is not an unprimeable number, because it can be changed into a prime (20670701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8635 + ... + 10765.

Almost surely, 2^20670700 is an apocalyptic number.

20670700 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 20670700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22669556).

20670700 is an abundant number, since it is smaller than the sum of its proper divisors (24668412).

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

20670700 is a wasteful number, since it uses less digits than its factorization.

20670700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242 (or 2235 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 20670700 is about 4546.5041515432. The cubic root of 20670700 is about 274.4427282328.

The spelling of 20670700 in words is "twenty million, six hundred seventy thousand, seven hundred".