20520366 has 8 divisors (see below), whose sum is σ = 41040744. Its totient is φ = 6840120.

The previous prime is 20520337. The next prime is 20520389. The reversal of 20520366 is 66302502.

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

20520366 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1710025 + ... + 1710036.

It is an arithmetic number, because the mean of its divisors is an integer number (5130093).

Almost surely, 2^20520366 is an apocalyptic number.

20520366 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.

20520366 is a wasteful number, since it uses less digits than its factorization.

20520366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420066.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20520366 is about 4529.9410592192. The cubic root of 20520366 is about 273.7757858157.

Adding to 20520366 its reverse (66302502), we get a palindrome (86822868).

The spelling of 20520366 in words is "twenty million, five hundred twenty thousand, three hundred sixty-six".