20847364 has 6 divisors (see below), whose sum is σ = 36482894. Its totient is φ = 10423680.

The previous prime is 20847353. The next prime is 20847371. The reversal of 20847364 is 46374802.

It can be written as a sum of positive squares in only one way, i.e., 11847364 + 9000000 = 3442^2 + 3000^2 .

It is a super-2 number, since 2×20847364² = 869225171496992, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2605917 + ... + 2605924.

Almost surely, 2^20847364 is an apocalyptic number.

It is an amenable number.

20847364 is a deficient number, since it is larger than the sum of its proper divisors (15635530).

20847364 is a wasteful number, since it uses less digits than its factorization.

20847364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211845 (or 5211843 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 20847364 is about 4565.8913697108. The cubic root of 20847364 is about 275.2223612002. Note that the first 3 decimals are identical.

The spelling of 20847364 in words is "twenty million, eight hundred forty-seven thousand, three hundred sixty-four".