20208478 has 8 divisors (see below), whose sum is σ = 32095872. Its totient is φ = 9509856.

The previous prime is 20208443. The next prime is 20208499. The reversal of 20208478 is 87480202.

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

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, 297150 + ... + 297217.

It is an arithmetic number, because the mean of its divisors is an integer number (4011984).

Almost surely, 2^20208478 is an apocalyptic number.

20208478 is a deficient number, since it is larger than the sum of its proper divisors (11887394).

20208478 is a wasteful number, since it uses less digits than its factorization.

20208478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594386.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 20208478 is about 4495.3840770283. The cubic root of 20208478 is about 272.3816639626.

The spelling of 20208478 in words is "twenty million, two hundred eight thousand, four hundred seventy-eight".