20523012 has 48 divisors (see below), whose sum is σ = 52093440. Its totient is φ = 6262272.

The previous prime is 20522987. The next prime is 20523053. The reversal of 20523012 is 21032502.

It is a junction number, because it is equal to n+sod(n) for n = 20522982 and 20523000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6189 + ... + 8907.

It is an arithmetic number, because the mean of its divisors is an integer number (1085280).

Almost surely, 2^20523012 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 20523012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26046720).

20523012 is an abundant number, since it is smaller than the sum of its proper divisors (31570428).

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

20523012 is a wasteful number, since it uses less digits than its factorization.

20523012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780 (or 2778 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20523012 is about 4530.2331065851. The cubic root of 20523012 is about 273.7875526557.

Adding to 20523012 its reverse (21032502), we get a palindrome (41555514).

The spelling of 20523012 in words is "twenty million, five hundred twenty-three thousand, twelve".