20217467625 has 64 divisors (see below), whose sum is σ = 34821715968. Its totient is φ = 10406400000.

The previous prime is 20217467561. The next prime is 20217467663. The reversal of 20217467625 is 52676471202.

It is not a de Polignac number, because 20217467625 - 2⁶ = 20217467561 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4659457 + ... + 4663793.

It is an arithmetic number, because the mean of its divisors is an integer number (544089312).

Almost surely, 2^20217467625 is an apocalyptic number.

20217467625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20217467625 is a deficient number, since it is larger than the sum of its proper divisors (14604248343).

20217467625 is a wasteful number, since it uses less digits than its factorization.

20217467625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787 (or 4777 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 20217467625 in words is "twenty billion, two hundred seventeen million, four hundred sixty-seven thousand, six hundred twenty-five".