20519936 has 44 divisors (see below), whose sum is σ = 42495720. Its totient is φ = 9891840.

The previous prime is 20519927. The next prime is 20519951. The reversal of 20519936 is 63991502.

It is a junction number, because it is equal to n+sod(n) for n = 20519896 and 20519905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29351 + ... + 30041.

Almost surely, 2^20519936 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 20519936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21247860).

20519936 is an abundant number, since it is smaller than the sum of its proper divisors (21975784).

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

20519936 is an equidigital number, since it uses as much as digits as its factorization.

20519936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 20519936 is about 4529.8935969844. The cubic root of 20519936 is about 273.7738734974.

The spelling of 20519936 in words is "twenty million, five hundred nineteen thousand, nine hundred thirty-six".