20867492 has 6 divisors (see below), whose sum is σ = 36518118. Its totient is φ = 10433744.

The previous prime is 20867489. The next prime is 20867521. The reversal of 20867492 is 29476802.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 4351396 = 4064^2 + 2086^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608433 + ... + 2608440.

It is an arithmetic number, because the mean of its divisors is an integer number (6086353).

Almost surely, 2^20867492 is an apocalyptic number.

It is an amenable number.

20867492 is a deficient number, since it is larger than the sum of its proper divisors (15650626).

20867492 is a wasteful number, since it uses less digits than its factorization.

20867492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216877 (or 5216875 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 20867492 is about 4568.0950077686. The cubic root of 20867492 is about 275.3109078673.

The spelling of 20867492 in words is "twenty million, eight hundred sixty-seven thousand, four hundred ninety-two".