20521203082 has 4 divisors (see below), whose sum is σ = 30781804626. Its totient is φ = 10260601540.

The previous prime is 20521203049. The next prime is 20521203091. The reversal of 20521203082 is 28030212502.

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

It can be written as a sum of positive squares in only one way, i.e., 18498992121 + 2022210961 = 136011^2 + 44969^2 .

It is a super-3 number, since 3×20521203082³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5130300769 + ... + 5130300772.

Almost surely, 2^20521203082 is an apocalyptic number.

20521203082 is a deficient number, since it is larger than the sum of its proper divisors (10260601544).

20521203082 is a wasteful number, since it uses less digits than its factorization.

20521203082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10260601543.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 20521203082 its reverse (28030212502), we get a palindrome (48551415584).

The spelling of 20521203082 in words is "twenty billion, five hundred twenty-one million, two hundred three thousand, eighty-two".