20521520016052 has 96 divisors (see below), whose sum is σ = 39639370982400. Its totient is φ = 9218751160320.

The previous prime is 20521520016013. The next prime is 20521520016061. The reversal of 20521520016052 is 25061002512502.

It is a happy number.

It is a super-2 number, since 2×20521520016052² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1104069903 + ... + 1104088489.

It is an arithmetic number, because the mean of its divisors is an integer number (412910114400).

Almost surely, 2^{20521520016052} is an apocalyptic number.

20521520016052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20521520016052 is a deficient number, since it is larger than the sum of its proper divisors (19117850966348).

20521520016052 is a wasteful number, since it uses less digits than its factorization.

20521520016052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19621 (or 19619 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 20521520016052 its reverse (25061002512502), we get a palindrome (45582522528554).

The spelling of 20521520016052 in words is "twenty trillion, five hundred twenty-one billion, five hundred twenty million, sixteen thousand, fifty-two".