20016870 has 16 divisors (see below), whose sum is σ = 48040560. Its totient is φ = 5337824.

The previous prime is 20016847. The next prime is 20016883. The reversal of 20016870 is 7861002.

It is a self number, because there is not a number n which added to its sum of digits gives 20016870.

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, 333585 + ... + 333644.

It is an arithmetic number, because the mean of its divisors is an integer number (3002535).

Almost surely, 2^20016870 is an apocalyptic number.

20016870 is an abundant number, since it is smaller than the sum of its proper divisors (28023690).

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

20016870 is a wasteful number, since it uses less digits than its factorization.

20016870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667239.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 20016870 is about 4474.0216807700. The cubic root of 20016870 is about 271.5180605861.

Adding to 20016870 its reverse (7861002), we get a palindrome (27877872).

The spelling of 20016870 in words is "twenty million, sixteen thousand, eight hundred seventy".