20532120 has 64 divisors (see below), whose sum is σ = 70398720. Its totient is φ = 4692864.

The previous prime is 20532119. The next prime is 20532121. The reversal of 20532120 is 2123502.

It is an interprime number because it is at equal distance from previous prime (20532119) and next prime (20532121).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20532120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20532121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11382 + ... + 13061.

It is an arithmetic number, because the mean of its divisors is an integer number (1099980).

Almost surely, 2^20532120 is an apocalyptic number.

20532120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20532120 is an abundant number, since it is smaller than the sum of its proper divisors (49866600).

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

20532120 is a wasteful number, since it uses less digits than its factorization.

20532120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24464 (or 24460 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20532120 is about 4531.2382413641. The cubic root of 20532120 is about 273.8280484697.

Adding to 20532120 its reverse (2123502), we get a palindrome (22655622).

The spelling of 20532120 in words is "twenty million, five hundred thirty-two thousand, one hundred twenty".