20135479 has 16 divisors (see below), whose sum is σ = 24888640. Its totient is φ = 15863040.

The previous prime is 20135447. The next prime is 20135501. The reversal of 20135479 is 97453102.

It is a cyclic number.

It is not a de Polignac number, because 20135479 - 2⁵ = 20135447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20135479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36949 + ... + 37489.

It is an arithmetic number, because the mean of its divisors is an integer number (1555540).

Almost surely, 2^20135479 is an apocalyptic number.

20135479 is a deficient number, since it is larger than the sum of its proper divisors (4753161).

20135479 is a wasteful number, since it uses less digits than its factorization.

20135479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 20135479 is about 4487.2574029133. The cubic root of 20135479 is about 272.0532938753.

The spelling of 20135479 in words is "twenty million, one hundred thirty-five thousand, four hundred seventy-nine".