20132864 has 22 divisors (see below), whose sum is σ = 40248114. Its totient is φ = 10065920.

The previous prime is 20132863. The next prime is 20132881. The reversal of 20132864 is 46823102.

It can be written as a sum of positive squares in only one way, i.e., 17572864 + 2560000 = 4192^2 + 1600^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8807 + ... + 10854.

Almost surely, 2^20132864 is an apocalyptic number.

It is an amenable number.

20132864 is a deficient number, since it is larger than the sum of its proper divisors (20115250).

20132864 is an equidigital number, since it uses as much as digits as its factorization.

20132864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19681 (or 19663 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20132864 is about 4486.9660127975. The cubic root of 20132864 is about 272.0415161543.

Adding to 20132864 its reverse (46823102), we get a palindrome (66955966).

The spelling of 20132864 in words is "twenty million, one hundred thirty-two thousand, eight hundred sixty-four".