20716217452 has 18 divisors (see below), whose sum is σ = 42172300212. Its totient is φ = 8878378824.

The previous prime is 20716217447. The next prime is 20716217491. The reversal of 20716217452 is 25471261702.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52847298 + ... + 52847689.

Almost surely, 2^20716217452 is an apocalyptic number.

It is an amenable number.

20716217452 is an abundant number, since it is smaller than the sum of its proper divisors (21456082760).

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

20716217452 is a wasteful number, since it uses less digits than its factorization.

20716217452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105695005 (or 105694996 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The spelling of 20716217452 in words is "twenty billion, seven hundred sixteen million, two hundred seventeen thousand, four hundred fifty-two".