20878468 has 24 divisors (see below), whose sum is σ = 39623360. Its totient is φ = 9568800.

The previous prime is 20878453. The next prime is 20878477. The reversal of 20878468 is 86487802.

20878468 = 87² + 88² + ... + 398².

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6523 + ... + 9181.

Almost surely, 2^20878468 is an apocalyptic number.

It is an amenable number.

20878468 is a deficient number, since it is larger than the sum of its proper divisors (18744892).

20878468 is a wasteful number, since it uses less digits than its factorization.

20878468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827 (or 2825 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 20878468 is about 4569.2962258974. The cubic root of 20878468 is about 275.3591692631.

The spelling of 20878468 in words is "twenty million, eight hundred seventy-eight thousand, four hundred sixty-eight".