20505502 has 8 divisors (see below), whose sum is σ = 32567616. Its totient is φ = 9649632.

The previous prime is 20505497. The next prime is 20505571. The reversal of 20505502 is 20550502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20505502² = 840951224544008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20505502.

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, 301518 + ... + 301585.

It is an arithmetic number, because the mean of its divisors is an integer number (4070952).

Almost surely, 2^20505502 is an apocalyptic number.

20505502 is a deficient number, since it is larger than the sum of its proper divisors (12062114).

20505502 is a wasteful number, since it uses less digits than its factorization.

20505502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603122.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 20505502 is about 4528.3001225625. The cubic root of 20505502 is about 273.7096663608.

The spelling of 20505502 in words is "twenty million, five hundred five thousand, five hundred two".