20416699 has 4 divisors (see below), whose sum is σ = 20565864. Its totient is φ = 20267536.

The previous prime is 20416679. The next prime is 20416703. The reversal of 20416699 is 99661402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20416699 - 2¹⁷ = 20285627 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20416679) 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, 74377 + ... + 74650.

It is an arithmetic number, because the mean of its divisors is an integer number (5141466).

Almost surely, 2^20416699 is an apocalyptic number.

20416699 is a deficient number, since it is larger than the sum of its proper divisors (149165).

20416699 is a wasteful number, since it uses less digits than its factorization.

20416699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149164.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 20416699 is about 4518.4841484728. The cubic root of 20416699 is about 273.3139772466.

It can be divided in two parts, 20416 and 699, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20416699 in words is "twenty million, four hundred sixteen thousand, six hundred ninety-nine".