20131078 has 8 divisors (see below), whose sum is σ = 32941800. Its totient is φ = 9150480.

The previous prime is 20131061. The next prime is 20131079. The reversal of 20131078 is 87013102.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 915049 = 20131078 / (2 + 0 + 1 + 3 + 1 + 0 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131079) 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 in 3 ways as a sum of consecutive naturals, for example, 457503 + ... + 457546.

It is an arithmetic number, because the mean of its divisors is an integer number (4117725).

Almost surely, 2^20131078 is an apocalyptic number.

20131078 is a deficient number, since it is larger than the sum of its proper divisors (12810722).

20131078 is a wasteful number, since it uses less digits than its factorization.

20131078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915062.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 20131078 is about 4486.7669874866. The cubic root of 20131078 is about 272.0334715874.

The spelling of 20131078 in words is "twenty million, one hundred thirty-one thousand, seventy-eight".