20479599 has 18 divisors (see below), whose sum is σ = 34412040. Its totient is φ = 11702376.

The previous prime is 20479583. The next prime is 20479609. The reversal of 20479599 is 99597402.

It is not a de Polignac number, because 20479599 - 2⁴ = 20479583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20479519) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22779 + ... + 23660.

It is an arithmetic number, because the mean of its divisors is an integer number (1911780).

Almost surely, 2^20479599 is an apocalyptic number.

20479599 is a deficient number, since it is larger than the sum of its proper divisors (13932441).

20479599 is a wasteful number, since it uses less digits than its factorization.

20479599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46459 (or 46449 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 20479599 is about 4525.4390947178. The cubic root of 20479599 is about 273.5943657786.

The spelling of 20479599 in words is "twenty million, four hundred seventy-nine thousand, five hundred ninety-nine".