20067870 has 16 divisors (see below), whose sum is σ = 48162960. Its totient is φ = 5351424.

The previous prime is 20067833. The next prime is 20067893. The reversal of 20067870 is 7876002.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 668929 = 20067870 / (2 + 0 + 0 + 6 + 7 + 8 + 7 + 0).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334435 + ... + 334494.

It is an arithmetic number, because the mean of its divisors is an integer number (3010185).

Almost surely, 2^20067870 is an apocalyptic number.

20067870 is an abundant number, since it is smaller than the sum of its proper divisors (28095090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20067870 is a wasteful number, since it uses less digits than its factorization.

20067870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668939.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 20067870 is about 4479.7176250295. The cubic root of 20067870 is about 271.7484608655.

The spelling of 20067870 in words is "twenty million, sixty-seven thousand, eight hundred seventy".