20801532 has 24 divisors (see below), whose sum is σ = 48895056. Its totient is φ = 6882688.

The previous prime is 20801507. The next prime is 20801567. The reversal of 20801532 is 23510802.

It is a junction number, because it is equal to n+sod(n) for n = 20801499 and 20801508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4683 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (2037294).

Almost surely, 2^20801532 is an apocalyptic number.

It is an amenable number.

20801532 is an abundant number, since it is smaller than the sum of its proper divisors (28093524).

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

20801532 is a wasteful number, since it uses less digits than its factorization.

20801532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12797 (or 12795 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20801532 is about 4560.8696539147. The cubic root of 20801532 is about 275.0205251898.

The spelling of 20801532 in words is "twenty million, eight hundred one thousand, five hundred thirty-two".