20926478 has 8 divisors (see below), whose sum is σ = 31527480. Its totient is φ = 10417320.

The previous prime is 20926463. The next prime is 20926483. The reversal of 20926478 is 87462902.

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, 22388 + ... + 23303.

It is an arithmetic number, because the mean of its divisors is an integer number (3940935).

Almost surely, 2^20926478 is an apocalyptic number.

20926478 is a deficient number, since it is larger than the sum of its proper divisors (10601002).

20926478 is a wasteful number, since it uses less digits than its factorization.

20926478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45922.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 20926478 is about 4574.5467535047. The cubic root of 20926478 is about 275.5700703299.

The spelling of 20926478 in words is "twenty million, nine hundred twenty-six thousand, four hundred seventy-eight".