20503679 has 16 divisors (see below), whose sum is σ = 25466880. Its totient is φ = 16109280.

The previous prime is 20503673. The next prime is 20503687. The reversal of 20503679 is 97630502.

It is a cyclic number.

It is not a de Polignac number, because 20503679 - 2²⁰ = 19455103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503673) 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, 1637 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (1591680).

Almost surely, 2^20503679 is an apocalyptic number.

20503679 is a deficient number, since it is larger than the sum of its proper divisors (4963201).

20503679 is a wasteful number, since it uses less digits than its factorization.

20503679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 20503679 is about 4528.0988284268. The cubic root of 20503679 is about 273.7015549198.

The spelling of 20503679 in words is "twenty million, five hundred three thousand, six hundred seventy-nine".