20157607 has 4 divisors (see below), whose sum is σ = 20168856. Its totient is φ = 20146360.

The previous prime is 20157593. The next prime is 20157617. The reversal of 20157607 is 70675102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20157607 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 (20157617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269 + ... + 6742.

It is an arithmetic number, because the mean of its divisors is an integer number (5042214).

Almost surely, 2^20157607 is an apocalyptic number.

20157607 is a deficient number, since it is larger than the sum of its proper divisors (11249).

20157607 is an equidigital number, since it uses as much as digits as its factorization.

20157607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11248.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 20157607 is about 4489.7223744904. The cubic root of 20157607 is about 272.1529155662.

The spelling of 20157607 in words is "twenty million, one hundred fifty-seven thousand, six hundred seven".