20878432 has 12 divisors (see below), whose sum is σ = 41104476. Its totient is φ = 10439200.

The previous prime is 20878399. The next prime is 20878433. The reversal of 20878432 is 23487802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20878433) by changing a digit.

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 as a sum of consecutive naturals, namely, 326194 + ... + 326257.

It is an arithmetic number, because the mean of its divisors is an integer number (3425373).

Almost surely, 2^20878432 is an apocalyptic number.

It is an amenable number.

20878432 is a deficient number, since it is larger than the sum of its proper divisors (20226044).

20878432 is an equidigital number, since it uses as much as digits as its factorization.

20878432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652461 (or 652453 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 20878432 is about 4569.2922865582. The cubic root of 20878432 is about 275.3590109990.

The spelling of 20878432 in words is "twenty million, eight hundred seventy-eight thousand, four hundred thirty-two".