20673764 has 6 divisors (see below), whose sum is σ = 36179094. Its totient is φ = 10336880.

The previous prime is 20673701. The next prime is 20673769. The reversal of 20673764 is 46737602.

It can be written as a sum of positive squares in only one way, i.e., 17977600 + 2696164 = 4240^2 + 1642^2 .

It is not an unprimeable number, because it can be changed into a prime (20673769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2584217 + ... + 2584224.

It is an arithmetic number, because the mean of its divisors is an integer number (6029849).

Almost surely, 2^20673764 is an apocalyptic number.

It is an amenable number.

20673764 is a deficient number, since it is larger than the sum of its proper divisors (15505330).

20673764 is a wasteful number, since it uses less digits than its factorization.

20673764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168445 (or 5168443 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 20673764 is about 4546.8411012482. The cubic root of 20673764 is about 274.4562876990.

The spelling of 20673764 in words is "twenty million, six hundred seventy-three thousand, seven hundred sixty-four".