20521363364 has 24 divisors (see below), whose sum is σ = 37815879360. Its totient is φ = 9717208416.

The previous prime is 20521363339. The next prime is 20521363367. The reversal of 20521363364 is 46336312502.

It is a super-2 number, since 2×20521363364² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20521363367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175409 + ... + 267975.

It is an arithmetic number, because the mean of its divisors is an integer number (1575661640).

Almost surely, 2^20521363364 is an apocalyptic number.

It is an amenable number.

20521363364 is a deficient number, since it is larger than the sum of its proper divisors (17294515996).

20521363364 is a wasteful number, since it uses less digits than its factorization.

20521363364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95507 (or 95505 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 20521363364 its reverse (46336312502), we get a palindrome (66857675866).

The spelling of 20521363364 in words is "twenty billion, five hundred twenty-one million, three hundred sixty-three thousand, three hundred sixty-four".