20667000 has 96 divisors (see below), whose sum is σ = 65267280. Its totient is φ = 5444800.

The previous prime is 20666999. The next prime is 20667011. The reversal of 20667000 is 76602.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248959 + ... + 249041.

Almost surely, 2^20667000 is an apocalyptic number.

20667000 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 20667000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32633640).

20667000 is an abundant number, since it is smaller than the sum of its proper divisors (44600280).

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

20667000 is an equidigital number, since it uses as much as digits as its factorization.

20667000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20667000 is about 4546.0972272929. The cubic root of 20667000 is about 274.4263524176.

The spelling of 20667000 in words is "twenty million, six hundred sixty-seven thousand".