20469999 has 8 divisors (see below), whose sum is σ = 29774592. Its totient is φ = 12406040.

The previous prime is 20469983. The next prime is 20470001. The reversal of 20469999 is 99996402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20469999 - 2⁴ = 20469983 is a prime.

20469999 is a modest number, since divided by 9999 gives 2046 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20469919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310119 + ... + 310184.

It is an arithmetic number, because the mean of its divisors is an integer number (3721824).

Almost surely, 2^20469999 is an apocalyptic number.

20469999 is a deficient number, since it is larger than the sum of its proper divisors (9304593).

20469999 is a wasteful number, since it uses less digits than its factorization.

20469999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620317.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 20469999 is about 4524.3782998330. The cubic root of 20469999 is about 273.5516091404.

The spelling of 20469999 in words is "twenty million, four hundred sixty-nine thousand, nine hundred ninety-nine".