20692017 has 10 divisors (see below), whose sum is σ = 30910418. Its totient is φ = 13794624.

The previous prime is 20692013. The next prime is 20692039. The reversal of 20692017 is 71029602.

It can be written as a sum of positive squares in only one way, i.e., 15046641 + 5645376 = 3879^2 + 2376^2 .

It is not a de Polignac number, because 20692017 - 2² = 20692013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20692013) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 127648 + ... + 127809.

Almost surely, 2^20692017 is an apocalyptic number.

20692017 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20692017 is a deficient number, since it is larger than the sum of its proper divisors (10218401).

20692017 is an equidigital number, since it uses as much as digits as its factorization.

20692017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255469 (or 255460 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20692017 is about 4548.8478761110. The cubic root of 20692017 is about 274.5370370163.

The spelling of 20692017 in words is "twenty million, six hundred ninety-two thousand, seventeen".