20547264 has 56 divisors (see below), whose sum is σ = 54945280. Its totient is φ = 6776064.

The previous prime is 20547259. The next prime is 20547269. The reversal of 20547264 is 46274502.

It is an interprime number because it is at equal distance from previous prime (20547259) and next prime (20547269).

It is not an unprimeable number, because it can be changed into a prime (20547269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19257 + ... + 20295.

Almost surely, 2^20547264 is an apocalyptic number.

20547264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20547264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27472640).

20547264 is an abundant number, since it is smaller than the sum of its proper divisors (34398016).

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

20547264 is a wasteful number, since it uses less digits than its factorization.

20547264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1147 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 20547264 is about 4532.9089997484. The cubic root of 20547264 is about 273.8953549282.

The spelling of 20547264 in words is "twenty million, five hundred forty-seven thousand, two hundred sixty-four".