2006023657 has 4 divisors (see below), whose sum is σ = 2188389456. Its totient is φ = 1823657860.

The previous prime is 2006023627. The next prime is 2006023673. The reversal of 2006023657 is 7563206002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2006023657 - 2⁷ = 2006023529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2006023627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91182883 + ... + 91182904.

It is an arithmetic number, because the mean of its divisors is an integer number (547097364).

Almost surely, 2^2006023657 is an apocalyptic number.

It is an amenable number.

2006023657 is a deficient number, since it is larger than the sum of its proper divisors (182365799).

2006023657 is a wasteful number, since it uses less digits than its factorization.

2006023657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182365798.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 2006023657 is about 44788.6554497900. The cubic root of 2006023657 is about 1261.1846708481.

Adding to 2006023657 its reverse (7563206002), we get a palindrome (9569229659).

The spelling of 2006023657 in words is "two billion, six million, twenty-three thousand, six hundred fifty-seven".