19880700 has 72 divisors (see below), whose sum is σ = 65745792. Its totient is φ = 4543680.

The previous prime is 19880687. The next prime is 19880711. The reversal of 19880700 is 708891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2634 + ... + 6833.

It is an arithmetic number, because the mean of its divisors is an integer number (913136).

Almost surely, 2^19880700 is an apocalyptic number.

19880700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19880700 is an abundant number, since it is smaller than the sum of its proper divisors (45865092).

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

19880700 is a wasteful number, since it uses less digits than its factorization.

19880700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9491 (or 9484 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 19880700 is about 4458.7778594588. Note that the first 3 decimals coincide. The cubic root of 19880700 is about 270.9009682496.

The spelling of 19880700 in words is "nineteen million, eight hundred eighty thousand, seven hundred".