20012878 has 8 divisors (see below), whose sum is σ = 30106872. Its totient is φ = 9977256.

The previous prime is 20012873. The next prime is 20012903. The reversal of 20012878 is 87821002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13725 + ... + 15112.

It is an arithmetic number, because the mean of its divisors is an integer number (3763359).

Almost surely, 2^20012878 is an apocalyptic number.

20012878 is a deficient number, since it is larger than the sum of its proper divisors (10093994).

20012878 is a wasteful number, since it uses less digits than its factorization.

20012878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29186.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 20012878 is about 4473.5755274724. The cubic root of 20012878 is about 271.5000096094.

The spelling of 20012878 in words is "twenty million, twelve thousand, eight hundred seventy-eight".