20730552 has 32 divisors (see below), whose sum is σ = 51958800. Its totient is φ = 6892544.

The previous prime is 20730551. The next prime is 20730569. The reversal of 20730552 is 25503702.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730551) 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, 11368 + ... + 13064.

Almost surely, 2^20730552 is an apocalyptic number.

It is an amenable number.

20730552 is an abundant number, since it is smaller than the sum of its proper divisors (31228248).

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

20730552 is a wasteful number, since it uses less digits than its factorization.

20730552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215 (or 2211 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20730552 is about 4553.0815938219. The cubic root of 20730552 is about 274.7073559079.

The spelling of 20730552 in words is "twenty million, seven hundred thirty thousand, five hundred fifty-two".