20520213365 has 8 divisors (see below), whose sum is σ = 24854389920. Its totient is φ = 16262748112.

The previous prime is 20520213359. The next prime is 20520213383. The reversal of 20520213365 is 56331202502.

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

It is a cyclic number.

It is not a de Polignac number, because 20520213365 - 2¹⁴ = 20520196981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19177235 + ... + 19178304.

It is an arithmetic number, because the mean of its divisors is an integer number (3106798740).

Almost surely, 2^20520213365 is an apocalyptic number.

It is an amenable number.

20520213365 is a deficient number, since it is larger than the sum of its proper divisors (4334176555).

20520213365 is a wasteful number, since it uses less digits than its factorization.

20520213365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38355651.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 20520213365 its reverse (56331202502), we get a palindrome (76851415867).

The spelling of 20520213365 in words is "twenty billion, five hundred twenty million, two hundred thirteen thousand, three hundred sixty-five".