20145878 has 8 divisors (see below), whose sum is σ = 30400272. Its totient is φ = 10012456.

The previous prime is 20145863. The next prime is 20145889. The reversal of 20145878 is 87854102.

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, 29825 + ... + 30492.

It is an arithmetic number, because the mean of its divisors is an integer number (3800034).

Almost surely, 2^20145878 is an apocalyptic number.

20145878 is a deficient number, since it is larger than the sum of its proper divisors (10254394).

20145878 is a wasteful number, since it uses less digits than its factorization.

20145878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60486.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 20145878 is about 4488.4159789396. The cubic root of 20145878 is about 272.1001199332.

The spelling of 20145878 in words is "twenty million, one hundred forty-five thousand, eight hundred seventy-eight".