20207916 has 36 divisors (see below), whose sum is σ = 52330824. Its totient is φ = 6571200.

The previous prime is 20207909. The next prime is 20207953. The reversal of 20207916 is 61970202.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20207916.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5370 + ... + 8321.

It is an arithmetic number, because the mean of its divisors is an integer number (1453634).

Almost surely, 2^20207916 is an apocalyptic number.

It is an amenable number.

20207916 is an abundant number, since it is smaller than the sum of its proper divisors (32122908).

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

20207916 is a wasteful number, since it uses less digits than its factorization.

20207916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13742 (or 13737 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20207916 is about 4495.3215680305. The cubic root of 20207916 is about 272.3791389511.

It can be divided in two parts, 20 and 207916, that added together give a square (207936 = 456²).

The spelling of 20207916 in words is "twenty million, two hundred seven thousand, nine hundred sixteen".