20407667 has 12 divisors (see below), whose sum is σ = 25137000. Its totient is φ = 16462656.

The previous prime is 20407643. The next prime is 20407669. The reversal of 20407667 is 76670402.

It is a happy number.

It is not a de Polignac number, because 20407667 - 2¹⁶ = 20342131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20407669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11417 + ... + 13082.

It is an arithmetic number, because the mean of its divisors is an integer number (2094750).

Almost surely, 2^20407667 is an apocalyptic number.

20407667 is a deficient number, since it is larger than the sum of its proper divisors (4729333).

20407667 is a wasteful number, since it uses less digits than its factorization.

20407667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24530 (or 24523 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 20407667 is about 4517.4845876882. The cubic root of 20407667 is about 273.2736681520.

The spelling of 20407667 in words is "twenty million, four hundred seven thousand, six hundred sixty-seven".