20720202 has 8 divisors (see below), whose sum is σ = 41440416. Its totient is φ = 6906732.

The previous prime is 20720153. The next prime is 20720209. The reversal of 20720202 is 20202702.

It is a sphenic number, since it is the product of 3 distinct primes.

20720202 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20720209) 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 3 ways as a sum of consecutive naturals, for example, 1726678 + ... + 1726689.

It is an arithmetic number, because the mean of its divisors is an integer number (5180052).

Almost surely, 2^20720202 is an apocalyptic number.

20720202 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20720202 is a wasteful number, since it uses less digits than its factorization.

20720202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453372.

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 20720202 is about 4551.9448590685. The cubic root of 20720202 is about 274.6616312139.

Adding to 20720202 its reverse (20202702), we get a palindrome (40922904).

It can be divided in two parts, 207 and 20202, that multiplied together give a palindrome (4181814).

The spelling of 20720202 in words is "twenty million, seven hundred twenty thousand, two hundred two".