19930806 has 32 divisors (see below), whose sum is σ = 50618880. Its totient is φ = 5694408.

The previous prime is 19930787. The next prime is 19930843. The reversal of 19930806 is 60803991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25986 + ... + 26741.

It is an arithmetic number, because the mean of its divisors is an integer number (1581840).

Almost surely, 2^19930806 is an apocalyptic number.

19930806 is an abundant number, since it is smaller than the sum of its proper divisors (30688074).

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

19930806 is a wasteful number, since it uses less digits than its factorization.

19930806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52745 (or 52739 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19930806 is about 4464.3931278506. The cubic root of 19930806 is about 271.1283642732.

It can be divided in two parts, 19930 and 806, that added together give a 4-th power (20736 = 12⁴).

The spelling of 19930806 in words is "nineteen million, nine hundred thirty thousand, eight hundred six".