20556350 has 12 divisors (see below), whose sum is σ = 38234904. Its totient is φ = 8222520.

The previous prime is 20556307. The next prime is 20556391. The reversal of 20556350 is 5365502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205514 + ... + 205613.

It is an arithmetic number, because the mean of its divisors is an integer number (3186242).

Almost surely, 2^20556350 is an apocalyptic number.

20556350 is a deficient number, since it is larger than the sum of its proper divisors (17678554).

20556350 is a wasteful number, since it uses less digits than its factorization.

20556350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411139 (or 411134 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 20556350 is about 4533.9111151411. The cubic root of 20556350 is about 273.9357211535.

The spelling of 20556350 in words is "twenty million, five hundred fifty-six thousand, three hundred fifty".