20283215653 has 4 divisors (see below), whose sum is σ = 20431268460. Its totient is φ = 20135162848.

The previous prime is 20283215567. The next prime is 20283215663. The reversal of 20283215653 is 35651238202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13525224804 + 6757990849 = 116298^2 + 82207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20283215653 is a prime.

It is a super-2 number, since 2×20283215653² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20283215663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 74026198 + ... + 74026471.

It is an arithmetic number, because the mean of its divisors is an integer number (5107817115).

Almost surely, 2^20283215653 is an apocalyptic number.

It is an amenable number.

20283215653 is a deficient number, since it is larger than the sum of its proper divisors (148052807).

20283215653 is a wasteful number, since it uses less digits than its factorization.

20283215653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148052806.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 20283215653 in words is "twenty billion, two hundred eighty-three million, two hundred fifteen thousand, six hundred fifty-three".