20417616825 has 48 divisors (see below), whose sum is σ = 34311911040. Its totient is φ = 10711697920.

The previous prime is 20417616823. The next prime is 20417616827. The reversal of 20417616825 is 52861671402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20417616823) and next prime (20417616827).

It is not a de Polignac number, because 20417616825 - 2¹ = 20417616823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20417616823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1307212 + ... + 1322738.

It is an arithmetic number, because the mean of its divisors is an integer number (714831480).

Almost surely, 2^20417616825 is an apocalyptic number.

20417616825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20417616825 is a deficient number, since it is larger than the sum of its proper divisors (13894294215).

20417616825 is a wasteful number, since it uses less digits than its factorization.

20417616825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15826 (or 15821 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 20417616825 in words is "twenty billion, four hundred seventeen million, six hundred sixteen thousand, eight hundred twenty-five".