20417697 has 16 divisors (see below), whose sum is σ = 32028480. Its totient is φ = 12810816.

The previous prime is 20417681. The next prime is 20417699. The reversal of 20417697 is 79671402.

It is a happy number.

It is not a de Polignac number, because 20417697 - 2⁴ = 20417681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20417699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21783 + ... + 22700.

It is an arithmetic number, because the mean of its divisors is an integer number (2001780).

Almost surely, 2^20417697 is an apocalyptic number.

20417697 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20417697 is a deficient number, since it is larger than the sum of its proper divisors (11610783).

20417697 is a wasteful number, since it uses less digits than its factorization.

20417697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44509 (or 44503 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 20417697 is about 4518.5945823895. The cubic root of 20417697 is about 273.3184305114.

The spelling of 20417697 in words is "twenty million, four hundred seventeen thousand, six hundred ninety-seven".