20523476 has 6 divisors (see below), whose sum is σ = 35916090. Its totient is φ = 10261736.

The previous prime is 20523469. The next prime is 20523479. The reversal of 20523476 is 67432502.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 2033476 = 4300^2 + 1426^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2565431 + ... + 2565438.

It is an arithmetic number, because the mean of its divisors is an integer number (5986015).

Almost surely, 2^20523476 is an apocalyptic number.

It is an amenable number.

20523476 is a deficient number, since it is larger than the sum of its proper divisors (15392614).

20523476 is a wasteful number, since it uses less digits than its factorization.

20523476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5130873 (or 5130871 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 20523476 is about 4530.2843177885. The cubic root of 20523476 is about 273.7896159732.

Adding to 20523476 its reverse (67432502), we get a palindrome (87955978).

The spelling of 20523476 in words is "twenty million, five hundred twenty-three thousand, four hundred seventy-six".