20078870 has 64 divisors (see below), whose sum is σ = 44789760. Its totient is φ = 6323712.

The previous prime is 20078867. The next prime is 20078897. The reversal of 20078870 is 7887002.

It is a happy number.

It is a super-2 number, since 2×20078870² = 806322040953800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55751 + ... + 56109.

It is an arithmetic number, because the mean of its divisors is an integer number (699840).

Almost surely, 2^20078870 is an apocalyptic number.

20078870 is an abundant number, since it is smaller than the sum of its proper divisors (24710890).

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

20078870 is a wasteful number, since it uses less digits than its factorization.

20078870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 20078870 is about 4480.9452127871. The cubic root of 20078870 is about 271.7981038531.

The spelling of 20078870 in words is "twenty million, seventy-eight thousand, eight hundred seventy".