20766704 has 40 divisors (see below), whose sum is σ = 46315488. Its totient is φ = 8835840.

The previous prime is 20766701. The next prime is 20766751. The reversal of 20766704 is 40766702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20766701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16994 + ... + 18174.

Almost surely, 2^20766704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20766704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23157744).

20766704 is an abundant number, since it is smaller than the sum of its proper divisors (25548784).

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

20766704 is a wasteful number, since it uses less digits than its factorization.

20766704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1347 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 20766704 is about 4557.0499229216. The cubic root of 20766704 is about 274.8669505149.

The spelling of 20766704 in words is "twenty million, seven hundred sixty-six thousand, seven hundred four".