20958550 has 12 divisors (see below), whose sum is σ = 38982996. Its totient is φ = 8383400.

The previous prime is 20958541. The next prime is 20958557. The reversal of 20958550 is 5585902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20958557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209536 + ... + 209635.

It is an arithmetic number, because the mean of its divisors is an integer number (3248583).

Almost surely, 2^20958550 is an apocalyptic number.

20958550 is a deficient number, since it is larger than the sum of its proper divisors (18024446).

20958550 is a wasteful number, since it uses less digits than its factorization.

20958550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419183 (or 419178 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 20958550 is about 4578.0508953047. The cubic root of 20958550 is about 275.7107783847.

The spelling of 20958550 in words is "twenty million, nine hundred fifty-eight thousand, five hundred fifty".