20147364 has 18 divisors (see below), whose sum is σ = 50928150. Its totient is φ = 6715776.

The previous prime is 20147341. The next prime is 20147371. The reversal of 20147364 is 46374102.

It can be written as a sum of positive squares in only one way, i.e., 19980900 + 166464 = 4470^2 + 408^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×20147364² = 811832552296992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 279789 + ... + 279860.

Almost surely, 2^20147364 is an apocalyptic number.

It is an amenable number.

20147364 is an abundant number, since it is smaller than the sum of its proper divisors (30780786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20147364 is a wasteful number, since it uses less digits than its factorization.

20147364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559659 (or 559654 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20147364 is about 4488.5815131286. The cubic root of 20147364 is about 272.1068099839.

The spelling of 20147364 in words is "twenty million, one hundred forty-seven thousand, three hundred sixty-four".