206157004 has 12 divisors (see below), whose sum is σ = 376460784. Its totient is φ = 98596784.

The previous prime is 206157001. The next prime is 206157013. The reversal of 206157004 is 400751602.

It is a self number, because there is not a number n which added to its sum of digits gives 206157004.

It is not an unprimeable number, because it can be changed into a prime (206157001) 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, 1120327 + ... + 1120510.

It is an arithmetic number, because the mean of its divisors is an integer number (31371732).

Almost surely, 2^206157004 is an apocalyptic number.

It is an amenable number.

206157004 is a deficient number, since it is larger than the sum of its proper divisors (170303780).

206157004 is a wasteful number, since it uses less digits than its factorization.

206157004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240864 (or 2240862 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 206157004 is about 14358.1685461621. The cubic root of 206157004 is about 590.7440617320.

The spelling of 206157004 in words is "two hundred six million, one hundred fifty-seven thousand, four".