20409607 has 8 divisors (see below), whose sum is σ = 21276656. Its totient is φ = 19559232.

The previous prime is 20409601. The next prime is 20409643. The reversal of 20409607 is 70690402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20409607 - 2¹¹ = 20407559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20409601) 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, 1638 + ... + 6595.

It is an arithmetic number, because the mean of its divisors is an integer number (2659582).

Almost surely, 2^20409607 is an apocalyptic number.

20409607 is a deficient number, since it is larger than the sum of its proper divisors (867049).

20409607 is an equidigital number, since it uses as much as digits as its factorization.

20409607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8337.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20409607 is about 4517.6993038493. The cubic root of 20409607 is about 273.2823272198.

The spelling of 20409607 in words is "twenty million, four hundred nine thousand, six hundred seven".