19700856 has 48 divisors (see below), whose sum is σ = 60980400. Its totient is φ = 5628672.

The previous prime is 19700851. The next prime is 19700873. The reversal of 19700856 is 65800791.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 19700856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19700851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19041 + ... + 20048.

It is an arithmetic number, because the mean of its divisors is an integer number (1270425).

Almost surely, 2^19700856 is an apocalyptic number.

It is an amenable number.

19700856 is an abundant number, since it is smaller than the sum of its proper divisors (41279544).

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

19700856 is a wasteful number, since it uses less digits than its factorization.

19700856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39108 (or 39101 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 19700856 is about 4438.5646328515. The cubic root of 19700856 is about 270.0816214138.

The spelling of 19700856 in words is "nineteen million, seven hundred thousand, eight hundred fifty-six".