20417172152 has 32 divisors (see below), whose sum is σ = 43396827600. Its totient is φ = 8927345664.

The previous prime is 20417172121. The next prime is 20417172157. The reversal of 20417172152 is 25127171402.

It is a super-3 number, since 3×20417172152³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20417172157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5164313 + ... + 5168264.

Almost surely, 2^20417172152 is an apocalyptic number.

It is an amenable number.

20417172152 is an abundant number, since it is smaller than the sum of its proper divisors (22979655448).

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

20417172152 is a wasteful number, since it uses less digits than its factorization.

20417172152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10332615 (or 10332611 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The spelling of 20417172152 in words is "twenty billion, four hundred seventeen million, one hundred seventy-two thousand, one hundred fifty-two".