20814478 has 16 divisors (see below), whose sum is σ = 32017680. Its totient is φ = 10144576.

The previous prime is 20814463. The next prime is 20814503. The reversal of 20814478 is 87441802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18426 + ... + 19522.

It is an arithmetic number, because the mean of its divisors is an integer number (2001105).

Almost surely, 2^20814478 is an apocalyptic number.

20814478 is a deficient number, since it is larger than the sum of its proper divisors (11203202).

20814478 is a wasteful number, since it uses less digits than its factorization.

20814478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 20814478 is about 4562.2886800377. The cubic root of 20814478 is about 275.0775670999.

The spelling of 20814478 in words is "twenty million, eight hundred fourteen thousand, four hundred seventy-eight".