20666350 has 24 divisors (see below), whose sum is σ = 39481848. Its totient is φ = 8042400.

The previous prime is 20666341. The next prime is 20666363. The reversal of 20666350 is 5366602.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3736 + ... + 7435.

It is an arithmetic number, because the mean of its divisors is an integer number (1645077).

Almost surely, 2^20666350 is an apocalyptic number.

20666350 is a deficient number, since it is larger than the sum of its proper divisors (18815498).

20666350 is a wasteful number, since it uses less digits than its factorization.

20666350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11220 (or 11215 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20666350 is about 4546.0257368387. The cubic root of 20666350 is about 274.4234753834.

The spelling of 20666350 in words is "twenty million, six hundred sixty-six thousand, three hundred fifty".