201720632 has 16 divisors (see below), whose sum is σ = 381697800. Its totient is φ = 99934560.

The previous prime is 201720619. The next prime is 201720637. The reversal of 201720632 is 236027102.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 201720598 and 201720607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201720637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114794 + ... + 116537.

Almost surely, 2^201720632 is an apocalyptic number.

It is an amenable number.

201720632 is a deficient number, since it is larger than the sum of its proper divisors (179977168).

201720632 is a wasteful number, since it uses less digits than its factorization.

201720632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231446 (or 231442 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 201720632 is about 14202.8388711553. The cubic root of 201720632 is about 586.4758140096.

Adding to 201720632 its reverse (236027102), we get a palindrome (437747734).

The spelling of 201720632 in words is "two hundred one million, seven hundred twenty thousand, six hundred thirty-two".