20520748 has 12 divisors (see below), whose sum is σ = 37149840. Its totient is φ = 9906512.

The previous prime is 20520743. The next prime is 20520767. The reversal of 20520748 is 84702502.

It is a super-2 number, since 2×20520748² = 842202196959008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20520743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88336 + ... + 88567.

It is an arithmetic number, because the mean of its divisors is an integer number (3095820).

Almost surely, 2^20520748 is an apocalyptic number.

It is an amenable number.

20520748 is a deficient number, since it is larger than the sum of its proper divisors (16629092).

20520748 is a wasteful number, since it uses less digits than its factorization.

20520748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176936 (or 176934 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20520748 is about 4529.9832229270. The cubic root of 20520748 is about 273.7774846434. Note that the first 3 decimals are identical.

The spelling of 20520748 in words is "twenty million, five hundred twenty thousand, seven hundred forty-eight".