20267684 has 6 divisors (see below), whose sum is σ = 35468454. Its totient is φ = 10133840.

The previous prime is 20267671. The next prime is 20267717. The reversal of 20267684 is 48676202.

It can be written as a sum of positive squares in only one way, i.e., 20160100 + 107584 = 4490^2 + 328^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2533457 + ... + 2533464.

It is an arithmetic number, because the mean of its divisors is an integer number (5911409).

Almost surely, 2^20267684 is an apocalyptic number.

It is an amenable number.

20267684 is a deficient number, since it is larger than the sum of its proper divisors (15200770).

20267684 is a wasteful number, since it uses less digits than its factorization.

20267684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066925 (or 5066923 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20267684 is about 4501.9644600996. The cubic root of 20267684 is about 272.6474089522.

The spelling of 20267684 in words is "twenty million, two hundred sixty-seven thousand, six hundred eighty-four".