20147464 has 16 divisors (see below), whose sum is σ = 38202300. Its totient is φ = 9960192.

The previous prime is 20147459. The next prime is 20147483. The reversal of 20147464 is 46474102.

It can be written as a sum of positive squares in 2 ways, for example, as 17056900 + 3090564 = 4130^2 + 1758^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 13437 + ... + 14860.

Almost surely, 2^20147464 is an apocalyptic number.

It is an amenable number.

20147464 is a deficient number, since it is larger than the sum of its proper divisors (18054836).

20147464 is a wasteful number, since it uses less digits than its factorization.

20147464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28392 (or 28388 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20147464 is about 4488.5926524914. The cubic root of 20147464 is about 272.1072601774.

The spelling of 20147464 in words is "twenty million, one hundred forty-seven thousand, four hundred sixty-four".