20479536 has 120 divisors (see below), whose sum is σ = 71495424. Its totient is φ = 5316480.

The previous prime is 20479531. The next prime is 20479553. The reversal of 20479536 is 63597402.

It is a super-2 number, since 2×20479536² = 838822789550592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20479536.

It is not an unprimeable number, because it can be changed into a prime (20479531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10165 + ... + 12011.

Almost surely, 2^20479536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20479536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35747712).

20479536 is an abundant number, since it is smaller than the sum of its proper divisors (51015888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20479536 is a wasteful number, since it uses less digits than its factorization.

20479536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879 (or 1870 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20479536 is about 4525.4321340619. The cubic root of 20479536 is about 273.5940852317.

The spelling of 20479536 in words is "twenty million, four hundred seventy-nine thousand, five hundred thirty-six".