20515652 has 12 divisors (see below), whose sum is σ = 36060780. Its totient is φ = 10212576.

The previous prime is 20515639. The next prime is 20515679. The reversal of 20515652 is 25651502.

It can be written as a sum of positive squares in 2 ways, for example, as 19483396 + 1032256 = 4414^2 + 1016^2 .

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, 10283 + ... + 12114.

It is an arithmetic number, because the mean of its divisors is an integer number (3005065).

Almost surely, 2^20515652 is an apocalyptic number.

It is an amenable number.

20515652 is a deficient number, since it is larger than the sum of its proper divisors (15545128).

20515652 is a wasteful number, since it uses less digits than its factorization.

20515652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22630 (or 22628 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 20515652 is about 4529.4207135129. The cubic root of 20515652 is about 273.7548200120.

The spelling of 20515652 in words is "twenty million, five hundred fifteen thousand, six hundred fifty-two".