20716211621052 has 48 divisors (see below), whose sum is σ = 55018665021600. Its totient is φ = 6736979387520.

The previous prime is 20716211621029. The next prime is 20716211621099. The reversal of 20716211621052 is 25012611261702.

20716211621052 is a `hidden beast` number, since 2 + 0 + 7 + 1 + 6 + 21 + 1 + 621 + 0 + 5 + 2 = 666.

It is a super-2 number, since 2×20716211621052² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20716211620998 and 20716211621016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2339224527 + ... + 2339233382.

It is an arithmetic number, because the mean of its divisors is an integer number (1146222187950).

Almost surely, 2^{20716211621052} is an apocalyptic number.

It is an amenable number.

20716211621052 is an abundant number, since it is smaller than the sum of its proper divisors (34302453400548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20716211621052 is a wasteful number, since it uses less digits than its factorization.

20716211621052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4678457963 (or 4678457955 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 20716211621052 its reverse (25012611261702), we get a palindrome (45728822882754).

The spelling of 20716211621052 in words is "twenty trillion, seven hundred sixteen billion, two hundred eleven million, six hundred twenty-one thousand, fifty-two".