20155032 has 48 divisors (see below), whose sum is σ = 54965040. Its totient is φ = 6671808.

The previous prime is 20155021. The next prime is 20155039. The reversal of 20155032 is 23055102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20154996 and 20155014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10413 + ... + 12195.

It is an arithmetic number, because the mean of its divisors is an integer number (1145105).

Almost surely, 2^20155032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20155032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27482520).

20155032 is an abundant number, since it is smaller than the sum of its proper divisors (34810008).

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

20155032 is a wasteful number, since it uses less digits than its factorization.

20155032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20155032 is about 4489.4355992708. The cubic root of 20155032 is about 272.1413264988.

The spelling of 20155032 in words is "twenty million, one hundred fifty-five thousand, thirty-two".